Mellanox SN5600 800GbE 64-Port OSFP Spectrum-4 Switch 2U Used
Quick answer: NVIDIA Spectrum-4 SN5600 SN5600 used, bench-tested. NVIDIA Spectrum-4 SN5600 with 64 OSFP ports at 800GbE plus one 25GbE SFP28 port, 51.2 Tb/s and 33.3 Bpps in 2U — the spine for 400G and 800G AI fabrics.
In stock: SN5600 is in stock — availability is confirmed per part number, so send the exact model you need and we check the shelf before quoting.
Need a quote? Message WhatsApp +86 13068616914 with the part number (for example SN5600) and the quantity — we reply with price, condition notes and photos of the actual unit. No price is listed here because every order is quoted per part number.
NVIDIA Spectrum-4 SN5600
The NVIDIA Spectrum-4 SN5600 is the 800G spine: 64 OSFP ports at 800GbE plus one 25GbE SFP28 port, 51.2 Tb/s of switching capacity, 33.3 Bpps and a 160 MB fully shared buffer in 2U. Ports split down to 400, 200 and 100GbE, so the same chassis serves as a 400G spine today and an 800G spine when the NICs catch up. It is the platform Spectrum-X fabrics are built on.
Condition: Used — cleaned, re-flashed and bench-tested on our own test line before it is listed. 90-day warranty from delivery.
| Specification | Details |
|---|---|
| Part number | SN5600 |
| Family | NVIDIA Spectrum-4 SN5600 |
| Switch silicon | NVIDIA Spectrum-4 |
| Ports | 64 × 800GbE OSFP, plus 1 × SFP28 25GbE management/data port |
| Port speed | 800GbE per port (400/200/100GbE with breakouts) |
| Connectors | OSFP (64 ports) + 1 × SFP28 25GbE |
| Switching capacity | 51.2 Tb/s |
| Packet rate | 33.3 Bpps |
| Packet buffer | 160 MB fully shared on-chip packet buffer |
| Airflow | C2P — connector-to-power (reverse) per the NVIDIA datasheet; confirm the exact build before ordering |
| Form factor | 2U rackmount |
| Dimensions | 86.2 × 438 × 788 mm |
| Power | 2 × hot-swap PSU (1+1), N+1 hot-swap fans |
| Management | x86 control plane, RJ45 management and console |
| Software | Cumulus Linux or SONiC |
Key features
- 64 × 800GbE OSFP ports + 1 × 25GbE SFP28
- 51.2 Tb/s switching capacity, 33.3 Bpps
- 160 MB fully shared packet buffer
- Breakout to 128 × 400GbE or up to 256 × 100/200GbE
- RoCEv2 with adaptive routing for AI workloads
- VXLAN scale of 512K shared forwarding entries, EVPN multi-homing
- Dual hot-swap PSU, N+1 hot-swap fans
Typical deployments
Spectrum-X AI fabrics, 400G/800G spine layers, end-of-row aggregation, storage fabrics and HPC interconnect where east-west bandwidth is the bottleneck.
What is included
- Switch chassis with both power supplies
- Fan units (C2P)
- Rack mounting hardware
- Condition report and bench-test notes
Not included
- OSFP and SFP28 optics, cables and breakout assemblies
- Network OS install media beyond what the unit ships with
SN5600 in the lineup
This is the only platform in our switch line that goes past 200G per port. Compared with the SN4600, one SN5600 replaces several 200G spines and cuts the number of optical links per rack; the trade-off is 2U of depth and 800G optics on the uplinks.
How it compares with models we also stock
| Model | Fabric | Ports | Best for |
|---|---|---|---|
| SN5600 | Ethernet 800G | 64 OSFP | 800G/400G AI spine, Spectrum-X |
| MSN4600-VS2RC | Ethernet 200G | 64 QSFP56 | 200G spine, 100G breakouts |
| MSN3800-CS2RO | Ethernet 100G | 64 QSFP28 | Dense 100G spine |
| MQM9700-NS2F | InfiniBand 400G | 64 (32 OSFP) | Native InfiniBand alternative |
Why buy this switch from Zhongxin Data
- Bench-tested on our own in-house test line — ports, fans and power supplies are checked before the unit leaves.
- We quote only what we can physically confirm: the exact part number, airflow direction and condition notes come from the unit in front of us.
- Used enterprise switches at secondary-market pricing, with a 90-day warranty from delivery.
- Worldwide shipping from Hong Kong, China; consolidation with servers, NICs and optics from the same rack is routine.
Request a quote
Send the part number SN5600, the quantity you need and your destination to WhatsApp +86 13068616914 (or reply to any thread on zhongxindata.hk). We confirm availability against the exact model before quoting, and we can quote alternative airflow builds or port-count variants from the same family if they fit your rack better.
Frequently asked questions
How many 800G ports does the SN5600 have?
64 OSFP ports at 800GbE, plus one SFP28 port at 25GbE for management or a low-speed link.
Can the ports run slower speeds?
Yes. 800G ports split to 400, 200 and 100GbE with the right breakout cabling — up to 128 × 400GbE or 256 × 100/200GbE.
Is it 2U?
Yes, 2U and 788 mm deep, so check rack depth and rear clearance before you plan the install.
What is the difference between SN5600 and SN5400?
SN5400 uses QSFP-DD at 400GbE per port with 25.6 Tb/s; SN5600 uses OSFP at 800GbE per port with 51.2 Tb/s. Both are Spectrum-4 and 2U.
Which network OS does it run?
Cumulus Linux or SONiC. We tell you exactly which image and version the unit carries before you buy.
Is it suitable for InfiniBand workloads?
It carries RoCEv2 lossless Ethernet, which most AI training fabrics use. If you need native IB verbs, the Quantum-2 QM9700/QM9790 is the correct platform.
What about airflow direction?
Spectrum-4 chassis are built for a specific airflow direction. Tell us which one your rack needs and we confirm the exact build before quoting.
What warranty is included?
90-day warranty from delivery, after bench testing on our own line.
Available at Zhongxin Data — enterprise network hardware specialists. Worldwide shipping from Hong Kong, China.
Product image is a reference image for the form factor — revision, label and airflow sticker vary by batch. Ask us for photos of the actual unit before you commit.