Intel Xeon Gold 5318S socket: LGA 4189
The Intel Xeon Gold 5318S uses the LGA 4189 socket. It is a 165 W 24-core Ice Lake-SP server processor with SGX enclave support and ECC memory.
- Socket
- LGA 4189
- Launched
- April 2021
- Cores and threads
- 24 and 48
- Base power
- 165 W
- Codename
- Ice Lake-SP
- Segment
- Server
- Family
- Intel Xeon Gold
- Clocks
- 2.1 / 3.4 GHz
Intel Xeon Gold 5318S specifications
| Cores | 24 |
|---|---|
| Threads | 48 |
| Core architecture | Sunny Cove (Ice Lake-SP) |
| Clocks | 2.1 GHz base, up to 3.4 GHz turbo |
| Cache | 36 MB |
| Processor base power (TDP) | 165 W |
| Manufacturing process | 10 nm |
| Memory support | DDR4 up to 2933 MT/s ECC, 8 channels, up to 4 TB per socket |
| PCI Express | 64 PCIe 4.0 lanes per socket |
| Interconnect | 3× UPI at 11.2 GT/s |
| ECC memory | Yes |
| Package | FCLGA4189, 77.5 × 56.5 mm |
| Sockets supported | Up to 2 sockets |
Motherboard compatibility
Intel Xeon Gold 5318S needs a motherboard with a LGA 4189 socket. Chipset by chipset data for this codename is not recorded yet. See the LGA 4189 chipset list and the board maker's CPU support list.
LGA 4189 at a glance
| Type | LGA, 4,189 contacts |
|---|---|
| Package size | 77.5 × 56.5 mm |
| Introduced | April 2020 |
| Memory | DDR4 with ECC, up to 8 channels on Ice Lake-SP and 6 channels on Cooper Lake-SP |
| Cooler mounting holes | Board specific (server heatsink) |
What the Xeon Gold 5318S is
The Xeon Gold 5318S is a 24-core server processor that Intel released in April 2021 with the Ice Lake-SP range for 2-socket systems. Its Sunny Cove cores run 2.1 GHz base to 3.4 GHz turbo with Hyper-Threading for 48 threads. Cache is 36 MB with 1.25 MB of L2 per core.
The S suffix marks a large 512 GB SGX enclave per CPU for confidential computing roles. The 10 nm process pairs 8 channels of DDR4-2933 with 64 PCIe 4.0 lanes for fast storage and network cards. Two-socket operation keeps scale out cost below larger Gold builds.
There is no integrated graphics on this model, so setup relies on board BMC graphics. ECC memory support guards data across long uptime. The socket package is FCLGA4189 at 77.5 × 56.5 mm.
Socket and motherboard compatibility
The 5318S fits the LGA 4189 socket on Whitley boards for Ice Lake-SP. Cedar Island boards for Cooper Lake share the socket name but do not accept this chip, so the board generation must match the processor generation. The server vendor CPU support list names the exact boards for S suffix parts.
Two-socket operation is possible with Xeon Gold dual processor parts, with single socket boards possible where the vendor qualifies them. A buyer running enclave workloads should confirm the board firmware exposes the SGX options before ordering.
Check memory population rules for 2-socket boards when ordering. Sixteen DIMM slots per socket is the platform shape, and both sockets should match in capacity and speed.
Memory, PCIe and cooling
The memory controller supports DDR4 up to 2933 MT/s in 8 channels, up to 4 TB per socket, with ECC support. Enclave nodes use RDIMM pairs across all channels for bandwidth with integrity. The controller does not accept DDR5.
The CPU supplies 64 PCIe 4.0 lanes per socket for network cards and NVMe storage. Two-socket boards split lanes across slots and onboard controllers, so the board specifications state which slots reach full speed. Three UPI links at 11.2 GT/s carry socket to socket traffic.
At 165 W, vendor-qualified performance air heatsinks with strong directed chassis airflow are needed. Mounting is board specific with no retail pattern, and the CPU cooler compatibility by socket guide explains why server sockets list no desktop bracket.
Upgrade paths
Against the Intel Xeon Gold 5318N, the 5318S trades network tuning for SGX enclave support with faster memory. The N part suits packet roles at DDR4-2666, while this S part suits confidential roles at DDR4-2933. Both share Whitley boards and 24-core layouts.
Moving to LGA 4677 needs new boards and DDR5 memory for Sapphire Rapids generations. The 5318S fits a confidential cloud node, an enclave host, or a dense virtual farm with security needs.
For used buyers, the S part makes sense when enclave size matters. When packet features matter, the N twin gives NFV tuning on the same board.
Frequently asked questions
What socket does the Intel Xeon Gold 5318S use?
It uses LGA 4189 on Whitley boards for Ice Lake-SP. Cedar Island Cooper boards share the socket name but do not accept it.
How many cores does the Intel Xeon Gold 5318S have?
24 cores with 48 threads, 2.1 GHz base and up to 3.4 GHz turbo, with 36 MB of cache.
What memory does the Intel Xeon Gold 5318S support?
DDR4 up to 2933 MT/s with ECC in 8 channels, up to 4 TB per socket.
What does the S suffix mean on the Xeon Gold 5318S?
The S marks a large 512 GB SGX enclave per CPU for confidential computing roles.
What is the TDP of the Intel Xeon Gold 5318S?
165 W. Performance air heatsinks with strong directed chassis airflow are needed.
Sources and verification
- List of Intel Xeon processors Ice Lake-based (Gold 5318S 2.1 to 3.4 GHz, 165 W)
- Intel Xeon Gold 5318S Processor (Intel ARK)
Facts last checked against these sources on . Page last edited on .