Intel Xeon Platinum 8558 48-Core 2.1GHz FCLGA4677 Server CPU
Intel Xeon Platinum 8558 - 48 cores, 260 MB L3, FCLGA4677
Quick answer: the Intel Xeon Platinum 8558 is a 5th Gen Xeon Scalable (Emerald Rapids) server processor with 48 cores and 96 threads, running at 2.1 GHz base and up to 4.0 GHz turbo, with 260 MB of L3 cache and a 330 W TDP. It uses the FCLGA4677 socket, DDR5-5200 memory across 8 channels, and PCIe 5.0.
5th Gen Xeon Scalable (Emerald Rapids) · sSpec SRN5A
48 cores / 96 threads · 2.1 GHz base, 4.0 GHz turbo · 260 MB L3 · 330 W · FCLGA4677 · DDR5-5200 · PCIe 5.0
In stock. The 8558 (SRN5A) is available now - confirm the quantity you need and we quote against live stock.
Talk to us on WhatsApp +86 13068616914 - send the model and quantity, and you get a written quote the same working session.
Specifications
| Processor | Intel Xeon Platinum 8558 |
| sSpec | SRN5A |
| Generation | 5th Gen Xeon Scalable (Emerald Rapids) |
| Cores / Threads | 48C / 96T |
| Base frequency | 2.1 GHz |
| Max turbo | 4.0 GHz |
| L3 cache | 260 MB |
| TDP | 330 W |
| Socket | FCLGA4677 |
| Memory | DDR5-5200, 8 channels, ECC |
| PCI Express | PCIe 5.0 · PCIe 5.0, up to 80 lanes |
| Lithography | Intel 7 |
| Launch | Q4 2023 |
| Instruction set | AVX-512, AMX, QAT / DSA / DLB / IAA accelerators |
| Scalability | Yes - 2S capable |
Which servers it fits
The 8558 drops into FCLGA4677 boards, which covers:
- Dell PowerEdge R660 / R660xs / R760 / R760xs
- HPE ProLiant DL360 Gen11 / DL380 Gen11
- Supermicro X13 系列主板
If you are upgrading a chassis you already own, tell us the server model and we confirm socket, heatsink and BIOS support before you commit.
Where this part fits
- Large VM consolidation
- HPC and CFD
- In-memory analytics
48 cores with 260 MB of L3 — the 8558 is the highest core count in this list and the largest cache. At 330 W it needs a 2U chassis with high-pressure heatsinks; do not plan on fitting it into a slim 1U.
How the FCLGA4677 line-up compares
Every part below is on the same socket and can be quoted from stock - pick by core count, clock and cache, and the platform stays the same:
| Processor | sSpec | Cores / Threads | Base / Turbo | L3 cache | TDP | Memory |
|---|---|---|---|---|---|---|
| Intel Xeon Gold 5515+ | SRN6H | 8 / 16 | 3.2 / 4.1 GHz | 22.5 MB | 165 W | DDR5-5200 |
| Intel Xeon Gold 6534 | SRN6A | 8 / 16 | 3.9 / 4.2 GHz | 22.5 MB | 195 W | DDR5-5200 |
| Intel Xeon Silver 4410T | SRMGS | 10 / 20 | 2.7 / 4.0 GHz | 26.25 MB | 150 W | DDR5-4000 |
| Intel Xeon Silver 4410Y | SRMGE | 12 / 24 | 2.0 / 3.9 GHz | 30 MB | 150 W | DDR5-4000 |
| Intel Xeon Silver 4510 | SRN60 | 12 / 24 | 2.4 / 4.1 GHz | 30 MB | 150 W | DDR5-4400 |
| Intel Xeon Silver 4514Y | SRN6J | 16 / 32 | 2.0 / 3.4 GHz | 30 MB | 150 W | DDR5-4400 |
| Intel Xeon Gold 6526Y | SRN6N | 16 / 32 | 2.8 / 3.9 GHz | 37.5 MB | 195 W | DDR5-5200 |
| Intel Xeon Gold 6544Y | SRN6R | 16 / 32 | 3.6 / 4.1 GHz | 45 MB | 270 W | DDR5-5200 |
| Intel Xeon Gold 5418Y | SRMGH | 24 / 48 | 2.0 / 3.8 GHz | 45 MB | 185 W | DDR5-4400 |
| Intel Xeon Silver 4516Y+ | SRN6K | 24 / 48 | 2.2 / 3.7 GHz | 45 MB | 185 W | DDR5-4400 |
| Intel Xeon Gold 6542Y | SRN6P | 24 / 48 | 2.9 / 4.1 GHz | 60 MB | 250 W | DDR5-5200 |
| Intel Xeon Gold 5520+ | SRN6L | 28 / 56 | 2.2 / 4.0 GHz | 52.5 MB | 205 W | DDR5-5200 |
| Intel Xeon Gold 6448Y | SRMGN | 32 / 64 | 2.1 / 4.1 GHz | 60 MB | 225 W | DDR5-4800 |
| Intel Xeon Gold 6530 | SRN5C | 32 / 64 | 2.1 / 4.0 GHz | 160 MB | 270 W | DDR5-5200 |
| Intel Xeon Gold 6538Y+ | SRN6M | 32 / 64 | 2.2 / 4.0 GHz | 60 MB | 225 W | DDR5-5200 |
| Intel Xeon Gold 6548Y+ | SRN6Q | 32 / 64 | 2.5 / 4.1 GHz | 60 MB | 250 W | DDR5-5200 |
| Intel Xeon Gold 6548N | SRN6U | 32 / 64 | 2.8 / 4.1 GHz | 60 MB | 250 W | DDR5-5200 |
| Intel Xeon Platinum 8558 (this part) | SRN5A | 48 / 96 | 2.1 / 4.0 GHz | 260 MB | 330 W | DDR5-5200 |
| Intel Xeon Platinum 8558P | SRMCF | 48 / 96 | 2.7 / 4.0 GHz | 260 MB | 350 W | DDR5-5200 |
What you get
- The processor itself, matched on sSpec SRN5A
- ESD-safe packaging for transit
- Written quote covering the exact part number and quantity
- 90-day warranty from delivery
Not included: heatsink, CPU carrier frame, and any licence. If you need the heatsink for your chassis, ask and we add it to the quote.
Why buyers source CPUs from Zhongxin Data
- Part-number level quoting. We quote by model plus sSpec, so what arrives matches what you specified.
- In-house re-flash and test line. Processors are checked on our own bench before they leave, not drop-shipped blind.
- Retail and wholesale on one account. Single units for a repair, volume tiers starting at 10 units for a rollout.
- One channel for the whole build. We also carry the servers, memory and RAID controllers these CPUs go into, so you can quote a complete node in one thread.
Other FCLGA4677 processors we hold: 5515+ (8C, 3.2-4.1 GHz), 6534 (8C, 3.9-4.2 GHz), 4410T (10C, 2.7-4.0 GHz)
Browse all server processors - every page lists socket, core count and sSpec, so you can match a part to the chassis you already own.
Request a quote
Send the model, sSpec and quantity on WhatsApp +86 13068616914, or use the button on this page. Quotes are written and valid for the day they are issued.
FAQ
What sSpec is this processor?
This is sSpec SRN5A. Every unit we quote is matched on sSpec, so you get the same stepping across the whole order rather than a mixed tray.
How many cores and threads does the 8558 have?
48 cores and 96 threads, running from a 2.1 GHz base clock up to 4.0 GHz maximum turbo, with 260 MB of L3 cache.
What socket does the 8558 need?
FCLGA4677. On that socket the part fits Dell PowerEdge R660 / R660xs / R760 / R760xs and similar boards.
What memory does the 8558 support?
DDR5-5200 across 8 channels. It will not run in a board wired for the other DDR generation, so confirm the platform before ordering.
What is the TDP and what cooling does it need?
330 W. Check the heatsink and airflow rating of the chassis before fitting a pair - the 330 W class needs the standard or high-performance heatsink option, not the low-power one.
Can I run two of these in one server?
Yes - 2S capable.
Can you supply matched pairs or larger volumes?
Yes. We quote single units, matched pairs from the same sSpec, and volume tiers that start at 10 units. Send the quantity you need and we come back with one price.
How do I get a price?
Pricing is quoted per order rather than published, so send the part number, sSpec and quantity on WhatsApp at +86 13068616914 and you get a written quote back.
What warranty comes with it?
90-day warranty from delivery.
Will this CPU work in the server I already have?
If the board takes a FCLGA4677 CPU and the BIOS supports the 5th Gen Xeon Scalable (Emerald Rapids) family, yes. Tell us the server model and we confirm socket, heatsink and BIOS level before you order.
Does it support AVX-512 and Intel AMX?
Instruction set extensions: AVX-512, AMX, QAT / DSA / DLB / IAA accelerators. If your software is built around AMX acceleration, pick a Sapphire Rapids, Emerald Rapids or Xeon 6 part rather than an Ice Lake one.
Can I mix different steppings in a dual-socket pair?
We do not recommend it. In a 2S board both sockets should carry the same model and the same sSpec, and we match pairs on sSpec by default when you order two.