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Intel Xeon Platinum 8251

12C/24T · 4.2 GHz · 240 W

A 12-core, 24-thread off-roadmap Xeon Platinum from the second-generation Xeon Scalable (Cascade Lake-SP) family, aimed at frequency-sensitive workloads. It runs at a very high 3.8 GHz base and up to 4.2 GHz in a 240 W TDP, and keeps a 24.75 MB L3 cache, giving roughly 2 MB of L3 per core instead of the usual 1.375 MB.

General

Manufacturer: Intel
Model: Intel Xeon Platinum 8251
Segment: Server
Generation: 2nd Gen Xeon Scalable (Cascade Lake-SP)
Codename: Cascade Lake-SP
Architecture: x86_64
Microarchitecture: Cascade Lake
Release date: —
Price: Search on Amazon

Cores & clocks

Cores / threads: 12 cores / 24 threads
Base clock: 3.80 GHz
Boost clock: 4.20 GHz
TDP (design W): 240 W
Unlocked: ✕ No
L2 cache: 12 MB
L3 cache: 24.8 MB
Technology (nm): 14 nm
14 nm

Platform

Socket: FCLGA3647
2-CPU (multi-socket): ✓ Yes
Up to 8 sockets
Integrated GPU: None
Memory type: DDR4-2933
6-channel
Memory size: Up to 1,024 GB
ECC memory: ✓ Yes
PCIe: PCIe 3.0 (48 lanes)

Instructions & AI

Instruction extensions: Intel SSE4.2Intel AVXIntel AVX2Intel AVX-512Intel DL Boost (VNNI)
NPU: None

OS support

Windows: Windows 10Windows 11 24H2Windows 11 25H2Windows 11 26H2
Linux: UbuntuFedoraArch Linux
Notes: Microsoft lists the 2nd Generation Intel Xeon Scalable family in the supported-processor lists for Windows 11 24H2 and 25H2 and for Windows 10 22H2; Microsoft has not published a separate 26H2 list, and the 25H2 entries still apply. Windows 11 additionally requires TPM 2.0 and UEFI Secure Boot on the platform. Server deployments normally run Windows Server or an enterprise Linux distribution.

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