{"title":"Network Adapters","description":"\u003ch2\u003eEnterprise Network Adapters (NICs)\u003c\/h2\u003e\u003cp\u003eMellanox ConnectX series network interface cards deliver RDMA over Converged Ethernet (RoCE v2), NVMe-oF offload, and hardware-accelerated encryption for datacenter servers. From 25GbE ConnectX-4 Lx to 200GbE ConnectX-7, each adapter enables zero-copy data transfer and CPU-bypass I\/O for AI, storage, and HPC workloads.\u003c\/p\u003e\u003cp\u003eAll adapters are quality-tested and shipped with warranty from Zhongxin Data, Hong Kong.\u003c\/p\u003e","products":[{"product_id":"used-mellanox-connectx-5-mcx516a-ccat-100gbe-dual-port-pcie-3-0-network-adapter","title":"Used Mellanox ConnectX-5 MCX516A-CCAT 100GbE Dual-Port PCIe 3.0 Network Adapter","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55715535094052,"sku":"MCX516A-CCAT","price":511.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/100GbE-Dual-Port-Network-Card-Used.webp?v=1783604102"},{"product_id":"used-mellanox-connectx-6-mcx653105a-ecat-100gbe-hdr100-single-port-pcie-4-0-adapter","title":"Used Mellanox ConnectX-6 MCX653105A-ECAT 100GbE HDR100 Single-Port PCIe 4.0 Adapter","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-6\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-6\u003c\/strong\u003e is a 100\/200GbE + HDR InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 4.0 x16 host interface, RoCE v2, RDMA over IB HDR (200 Gbps) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.6 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-6\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100\/200GbE + HDR InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×200G QSFP56 \/ 2×100G QSFP28; HDR 200Gb\/s\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 4.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v2, RDMA over IB HDR (200 Gbps)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand HDR (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, Hardware Crypto (IPsec\/MACsec\/TLS), Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.6 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 40W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-6 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-6 is a 200GbE\/HDR InfiniBand VPI adapter with PCIe 4.0, hardware crypto offloads (IPsec\/MACsec\/TLS), and GPUDirect RDMA—designed for next-gen AI supercomputers and 200G storage fabrics.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-6 support hardware encryption?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-6 includes inline IPsec, MACsec, and TLS hardware crypto engines that offload encryption from the CPU at full line rate.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat PCIe does ConnectX-6 require?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003ePCIe 4.0 x16 for 200G line-rate. It also works in PCIe 3.0 x16 slots at reduced throughput (100G line-rate).\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-6 compare to ConnectX-7?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-7 adds 400GbE, PCIe 5.0, and data-path acceleration for DPU offload. ConnectX-6 remains the best value for 200GbE\/HDR deployments.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55715535225124,"sku":"MCX653105A-ECAT","price":6727.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/100GbE-InfiniBand-HDR100-Single-Port-Network.webp?v=1783604120"},{"product_id":"mellanox-mcx4421a-acan-25gbe-adapter","title":"NVIDIA Mellanox ConnectX-4 Lx MCX4421A-ACAN 25GbE Dual-Port Network Adapter","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-4 Lx\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-4 Lx\u003c\/strong\u003e is a 10\/25\/40GbE network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x8 host interface, RoCE v2 RDMA support, and VXLAN hardware offloads. With \u0026lt; 1.5 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-4 Lx\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40GbE\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×40G QSFP+ \/ 2×10G SFP+ \/ 1×25G SFP28 \/ 2×25G SFP28\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x8\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v2\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet only (no IB)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVXLAN, SR-IOV, NVMe-oF initiator\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1.5 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 15W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-4 Lx adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe ConnectX-4 Lx is a cost-effective 10\/25\/40GbE Ethernet adapter with RoCE v2 RDMA support—targeted at cloud, telecom, and storage applications that don't require 100GbE.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-4 Lx support InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eNo. The Lx variant is Ethernet-only. For dual Ethernet+InfiniBand, use ConnectX-4 (non-Lx) or ConnectX-5\/6.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat's the difference between ConnectX-4 and ConnectX-4 Lx?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-4 supports 100GbE + EDR IB with full RoCE v1\/v2, while the Lx variant supports up to 40GbE Ethernet-only with RoCE v2 and fewer offloads—at roughly half the cost.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eCan ConnectX-4 Lx be used for NVMe-oF?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes, as NVMe-oF initiator (host side). Target mode is available on ConnectX-4 and ConnectX-5 only.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55722806214948,"sku":"MCX4421A-ACAN","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/4421-acan_300____20220315190326.jpg?v=1783736300"},{"product_id":"mellanox-mcx4131a-gcat-40gbe-adapter","title":"NVIDIA Mellanox ConnectX-4 Lx MCX4131A-GCAT 40GbE Single-Port Network Adapter","description":"\u003cp\u003eNVIDIA ConnectX-4 Lx EN MCX4131A-GCAT 40GbE single-port QSFP28 network adapter. PCIe 3.0 x8 interface. Supports 1\/10\/25\/40 Gb\/s Ethernet. ConnectX-4 Lx series — suitable for cost-effective upgrades in existing enterprise infrastructure. Tested and verified working.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePort: 1 x QSFP28 (40GbE)\u003c\/li\u003e\n\u003cli\u003eInterface: PCIe 3.0 x8\u003c\/li\u003e\n\u003cli\u003eSpeed: 1\/10\/25\/40 Gb\/s Ethernet\u003c\/li\u003e\n\u003cli\u003eSeries: ConnectX-4 Lx\u003c\/li\u003e\n\u003cli\u003eUse Case: Enterprise infrastructure upgrade\u003c\/li\u003e\n\u003cli\u003eCondition: Used, tested and verified working\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55722870210852,"sku":"MCX4131A-GCAT","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/MCX4131A-GCAT___20240607194440.png?v=1783736420"},{"product_id":"mellanox-mcx4621a-acab-100gbe-adapter","title":"NVIDIA Mellanox ConnectX-4 EN MCX4621A-ACAB 100GbE Single-Port Network Adapter","description":"\u003cp\u003eNVIDIA ConnectX-4 EN MCX4621A-ACAB 100GbE single-port QSFP28 network adapter. PCIe 3.0 x16 interface. Supports 10\/25\/40\/50\/100 Gb\/s Ethernet. Designed for high-performance enterprise data center and cloud computing environments requiring maximum bandwidth and low latency. Tested and verified working.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePort: 1 x QSFP28 (100GbE)\u003c\/li\u003e\n\u003cli\u003eInterface: PCIe 3.0 x16\u003c\/li\u003e\n\u003cli\u003eSpeed: 10\/25\/40\/50\/100 Gb\/s Ethernet\u003c\/li\u003e\n\u003cli\u003eSeries: ConnectX-4\u003c\/li\u003e\n\u003cli\u003eUse Case: Enterprise Data Center, Cloud Computing\u003c\/li\u003e\n\u003cli\u003eCondition: Used, tested and verified working\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55722931126564,"sku":"MCX4621A-ACAB","price":510.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/MCX4621A-ACAB_450.jpg?v=1783736485"},{"product_id":"server-network-interface-card-connectx-5-ex-mcx516a-cdat-100","title":"Server Network Interface Card ConnectX-5 Ex MCX516A-CDAT 100GbE Dual Port QSFP28 PCIe4.0 X16 Data Center Network Adapter","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807003525412,"sku":"ALI-1601803593676","price":563.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/connectx-5-ex.webp?v=1784863565"},{"product_id":"server-network-interface-card-connectx-5-mcx512a-acut-25gbe","title":"Server Network Interface Card ConnectX-5 MCX512A-ACUT 25GbE Dual Port SFP28 PCIe3.0 X8 Data Center Network Adapter","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807004246308,"sku":"ALI-1601804084101","price":268.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/connectx-5-mcx512a.webp?v=1784863578"},{"product_id":"network-interface-card-mellanox-mcx512a-acat-en-10-25gbe-dua","title":"Network Interface Card Mellanox MCX512A-ACAT EN 10\/25GbE Dual Port SFP28 PCIe","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807005753636,"sku":"ALI-1601803971573","price":239.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/mcx512a-acat.webp?v=1784863612"},{"product_id":"network-interface-card-mellanox-mcx4121a-xcat-lx-en-10gbe-du","title":"Network Interface Card Mellanox MCX4121A-XCAT Lx EN 10GbE Dual-port SFP28 PCIe3.0 X8","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-4\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-4\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (up to 100 Gbps) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 1.3 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-4\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G QSFP28 \/ 2×50G \/ 4×25G\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (up to 100 Gbps)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand FDR10\/EDR\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1.3 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 25W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-4 network adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-4 is a 100GbE\/EDR InfiniBand network adapter supporting RoCE v1\/v2 RDMA, NVMe-oF, and GPUDirect—designed for HPC, cloud, and storage workloads.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-4 support NVMe-oF?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-4 supports NVMe-oF target and initiator modes for remote NVMe storage access over Ethernet or InfiniBand.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat PCIe generation does ConnectX-4 use?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003ePCIe 3.0 x16, providing up to 128 Gbps host bandwidth for 100GbE line-rate operation.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-4 compare to ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-5 adds higher throughput (200GbE HDR), ConnectX-6 VPI mode, advanced NVMe-oF offloads, and PCIe 4.0 support. ConnectX-4 remains excellent for 100GbE deployments at lower cost.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807006769444,"sku":"ALI-1601803889276","price":69.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/mcx4121a-xcat.webp?v=1784863631"},{"product_id":"25gbe-dual-port-network-card-used-for-mellanox-cx4-mcx4121a","title":"25GbE Dual-Port Network Card Used for Mellanox CX4 MCX4121A-ACAT SFP28 PCIe 3.0 X8 NIC","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-4\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-4\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (up to 100 Gbps) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 1.3 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-4\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G QSFP28 \/ 2×50G \/ 4×25G\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (up to 100 Gbps)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand FDR10\/EDR\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1.3 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 25W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-4 network adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-4 is a 100GbE\/EDR InfiniBand network adapter supporting RoCE v1\/v2 RDMA, NVMe-oF, and GPUDirect—designed for HPC, cloud, and storage workloads.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-4 support NVMe-oF?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-4 supports NVMe-oF target and initiator modes for remote NVMe storage access over Ethernet or InfiniBand.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat PCIe generation does ConnectX-4 use?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003ePCIe 3.0 x16, providing up to 128 Gbps host bandwidth for 100GbE line-rate operation.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-4 compare to ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-5 adds higher throughput (200GbE HDR), ConnectX-6 VPI mode, advanced NVMe-oF offloads, and PCIe 4.0 support. ConnectX-4 remains excellent for 100GbE deployments at lower cost.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807032852772,"sku":"ALI-1601786075248","price":74.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/25GbE-Dual-Port-Network-Card-Used.webp?v=1784864019"},{"product_id":"25gbe-dual-port-network-card-used-for-mellanox-cx5-mcx512a-a","title":"25GbE Dual-Port Network Card Used for Mellanox CX5 MCX512A-ACUT SFP28 PCIe 3.0 x8 NIC","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807035965732,"sku":"ALI-1601803612482","price":264.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/25GbE-Dual-Port-Network-Card-Used_366a3378-bad8-4a7c-8a50-a938abb49e86.webp?v=1784864093"},{"product_id":"25gbe-dual-port-network-card-used-for-mellanox-cx4-mcx4121a-1","title":"25GbE Dual-Port Network Card Used for Mellanox CX4 MCX4121A-ACAT PCIe 3.0 X8 NIC","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-4\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-4\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (up to 100 Gbps) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 1.3 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-4\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G QSFP28 \/ 2×50G \/ 4×25G\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (up to 100 Gbps)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand FDR10\/EDR\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1.3 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 25W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-4 network adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-4 is a 100GbE\/EDR InfiniBand network adapter supporting RoCE v1\/v2 RDMA, NVMe-oF, and GPUDirect—designed for HPC, cloud, and storage workloads.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-4 support NVMe-oF?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-4 supports NVMe-oF target and initiator modes for remote NVMe storage access over Ethernet or InfiniBand.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat PCIe generation does ConnectX-4 use?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003ePCIe 3.0 x16, providing up to 128 Gbps host bandwidth for 100GbE line-rate operation.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-4 compare to ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-5 adds higher throughput (200GbE HDR), ConnectX-6 VPI mode, advanced NVMe-oF offloads, and PCIe 4.0 support. ConnectX-4 remains excellent for 100GbE deployments at lower cost.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807037833508,"sku":"ALI-1601786071458","price":69.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/25GbE-Dual-Port-Network-Card-Used_332756c4-3e3a-46fe-8db3-921a0ac0e523.webp?v=1784864108"},{"product_id":"100gbe-dual-port-network-card-used-for-mellanox-cx5-mcx516a","title":"100GbE Dual-Port Network Card Used for Mellanox CX5 MCX516A-CCAT PCIe 3.0 x16 NIC","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807040225572,"sku":"ALI-1601787607121","price":465.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/100GbE-Dual-Port-Network-Card-Used_33c35836-4b77-4591-94d0-615aff699314.webp?v=1784864185"},{"product_id":"100gbe-dual-port-network-card-used-for-mellanox-cx5-mcx516a-1","title":"100GbE Dual-Port Network Card Used for Mellanox CX5 MCX516A-CDAT PCIe 3.0 X16 NIC","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807040291108,"sku":"ALI-1601787610742","price":577.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/100GbE-Dual-Port-Network-Card-Used_ed35729e-8123-4b57-b4e0-412ec1939919.webp?v=1784864196"},{"product_id":"100gbe-dual-port-network-card-used-for-mellanox-connectx-5-m","title":"100GbE Dual-Port Network Card Used for Mellanox ConnectX-5 MCX516A-CDAT PCIe 4.0 x16 NIC","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807042847012,"sku":"ALI-1601787366201","price":577.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/100GbE-Dual-Port-Network-Card-Used_1e9cc418-3d8a-4495-8bb1-744bc76d96de.webp?v=1784864310"},{"product_id":"100gbe-dual-port-network-card-used-for-mellanox-cx5-mcx516a-ccat-pcie-3-0-x16-nic","title":"100GbE Dual-Port Network Card Used for Mellanox CX5 MCX516A-CCAT PCIe 3.0 x16 NIC","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807050088740,"sku":"ALI-1601787312172","price":465.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/100GbE-Dual-Port-Network-Card-Used_cde2d378-25db-4d47-bf18-3c6fd62b1bf6.webp?v=1784864962"},{"product_id":"25gbe-dual-port-network-card-used-for-mellanox-cx5-mcx512a-acat-sfp28-pcie-3-0-x8-nic","title":"25GbE Dual-Port Network Card Used for Mellanox CX5 MCX512A-ACAT SFP28 PCIe 3.0 X8 NIC","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807051563300,"sku":"ALI-1601786251219","price":239.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/25GbE-Dual-Port-Network-Card-Used_c641f77f-afc4-4f30-891d-4c22d3608b10.webp?v=1784864996"},{"product_id":"25gbe-dual-port-network-card-used-for-mellanox-cx5-mcx512a-acat-sfp28-pcie-3-0-x8-nic-1","title":"25GbE Dual-Port Network Card Used for Mellanox CX5 MCX512A-ACAT SFP28 PCIe 3.0 x8 NIC","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807051694372,"sku":"ALI-1601787144913","price":239.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/25GbE-Dual-Port-Network-Card-Used_988aa94b-9467-4e76-8847-fb11f0f58605.webp?v=1784865021"},{"product_id":"25gbe-dual-port-network-card-used-for-mellanox-cx4-mcx4121a-acat-sfp28-pcie-3-0-x8-nic","title":"25GbE Dual-Port Network Card Used for Mellanox CX4 MCX4121A-ACAT SFP28 PCIe 3.0 x8 NIC","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-4\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-4\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (up to 100 Gbps) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 1.3 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-4\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G QSFP28 \/ 2×50G \/ 4×25G\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (up to 100 Gbps)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand FDR10\/EDR\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1.3 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 25W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-4 network adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-4 is a 100GbE\/EDR InfiniBand network adapter supporting RoCE v1\/v2 RDMA, NVMe-oF, and GPUDirect—designed for HPC, cloud, and storage workloads.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-4 support NVMe-oF?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-4 supports NVMe-oF target and initiator modes for remote NVMe storage access over Ethernet or InfiniBand.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat PCIe generation does ConnectX-4 use?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003ePCIe 3.0 x16, providing up to 128 Gbps host bandwidth for 100GbE line-rate operation.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-4 compare to ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-5 adds higher throughput (200GbE HDR), ConnectX-6 VPI mode, advanced NVMe-oF offloads, and PCIe 4.0 support. ConnectX-4 remains excellent for 100GbE deployments at lower cost.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807051727140,"sku":"ALI-1601786078386","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/25GbE-Dual-Port-Network-Card-Used_b1183e27-c1d4-4c33-b547-f27a8665732e.webp?v=1784865029"},{"product_id":"100gbe-dual-port-network-card-used-for-mellanox-cx5-mcx516a-ccat-pcie-3-0-x16-nic-1","title":"100GbE Dual-Port Network Card Used for Mellanox CX5 MCX516A-CCAT PCIe 3.0 x16 NIC","description":"\u003ch2\u003eNVIDIA Mellanox ConnectX-5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNVIDIA Mellanox ConnectX-5\u003c\/strong\u003e is a 10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand network adapter by NVIDIA Mellanox, featuring PCIe 3.0 x16 host interface, RoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G) RDMA support, and NVMe-oF target\/initiator hardware offloads. With \u0026lt; 0.8 μs RDMA RDMA latency, it enables zero-CPU-copy data movement for HPC, AI\/ML, and storage workloads.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCondition: Refurbished \/ Pre-owned — fully tested, cleaned, and verified. Ships with warranty coverage.\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:12px 0;font-size:14px;\"\u003e\\\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;width:35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#f8f9fa;padding:8px;border:1px solid #dee2e6;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\\\n\u003ctbody\u003e\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConnectX-5\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/25\/40\/50\/100GbE + EDR\/HDR100 InfiniBand\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLane Config\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1×100G \/ 2×50G \/ 4×25G (QSFP28); 1×25G (SFP28); 1×100GbE HDR (QSFP28)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePcie\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCIe 3.0 x16\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRdma\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoCE v1 \u0026amp; v2, RDMA over IB (EDR 100G \/ HDR100 100G)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEthernet, InfiniBand EDR\/HDR100 (VPI dual-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOffloads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNVMe-oF target\/initiator, VXLAN, SR-IOV, GPUDirect RDMA, GPUDirect Async, Advanced Switching\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLatency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.8 μs RDMA\u003c\/td\u003e\n\u003c\/tr\u003e\\\\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 30W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is the ConnectX-5 adapter?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eThe Mellanox ConnectX-5 is a dual-mode 100GbE\/InfiniBand VPI adapter with RoCE v2 and IB RDMA, NVMe-oF, and GPUDirect RDMA—the most versatile adapter for mixed Ethernet+IB datacenter deployments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eDoes ConnectX-5 support both Ethernet and InfiniBand?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eYes. ConnectX-5 VPI adapters can operate in Ethernet or InfiniBand mode (EDR 100G or HDR100 100G) per-port, enabling flexible deployment in mixed environments.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eWhat is GPUDirect RDMA on ConnectX-5?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eGPUDirect RDMA allows NVIDIA GPUs to read\/write network data directly without CPU involvement, reducing latency to \u0026lt;0.8 μs and enabling peer-to-peer GPU communication for AI training.\u003c\/p\u003e\u003c\/details\u003e\\\\n\u003cdetails style=\"margin:8px 0;padding:8px;border:1px solid #e0e0e0;border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;color:#1a1a1a;\"\u003eHow does ConnectX-5 compare to ConnectX-6?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0;color:#444;\"\u003eConnectX-6 adds 200GbE HDR InfiniBand, PCIe 4.0 x16, and advanced crypto\/security offloads. ConnectX-5 is ideal for 100GbE deployments; ConnectX-6 for 200G\/HDR interconnects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cp\u003e\u003cem\u003eAvailable at \u003ca href=\"https:\/\/zhongxindata.hk\"\u003eZhongxin Data\u003c\/a\u003e — enterprise network hardware specialists. Worldwide shipping from Hong Kong.\u003c\/em\u003e\u003c\/p\u003e","brand":"NVIDIA Mellanox","offers":[{"title":"Default Title","offer_id":55807051825444,"sku":"ALI-1601786222405","price":465.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/6223\/6708\/files\/100GbE-Dual-Port-Network-Card-Used_165be68d-fe6f-44b4-91e3-e576128ddfc4.webp?v=1784865042"}],"url":"https:\/\/zhongxindata.hk\/collections\/network-adapters.oembed","provider":"Zhongxin Data","version":"1.0","type":"link"}