CPUServerReleased 2025

Intel Xeon 6556P-B

36C/72T · 3.5 GHz · 215 W

The Xeon 6556P-B is a 36-core model in Intel's Xeon 6 SoC family (Granite Rapids-D), launched in early 2025. Intel rates it for extended-temperature communications use, and it includes Intel vRAN Boost, an on-chip accelerator for 5G layer 1 processing, together with integrated Ethernet and QuickAssist, Dynamic Load Balancer and Data Streaming accelerators, targeting virtualized radio access network equipment. It launched at $2,628, and Intel later raised its recommended price.

General

Manufacturer: Intel
Model: Intel Xeon 6556P-B
Segment: Server
Generation: Xeon 6 SoC (Granite Rapids-D)
Codename: Granite Rapids-D
Architecture: x86_64
Microarchitecture: Redwood Cove
Release date: 2025
Price: $2,943Search on Amazon

Cores & clocks

Cores / threads: 36 cores / 72 threads
Base clock: 2.30 GHz
Boost clock: 3.50 GHz
TDP (design W): 215 W
Unlocked: ✕ No
L2 cache: 72 MB
L3 cache: 144 MB
Technology (nm): 3 nm
Intel 3

Platform

Socket: FCBGA4368
2-CPU (multi-socket): ✕ No
Integrated GPU: None
Memory type: DDR5-6400
4-channel
Memory size: Up to 1,157 GB
ECC memory: ✓ Yes
PCIe: PCIe 5.0 (32 lanes) + 4.0 (16 lanes)

Instructions & AI

Instruction extensions: Intel AMXSSE4.2AVXAVX2AVX-512
NPU: None

OS support

Linux: UbuntuFedoraArch Linux
Notes: Xeon 6 server processors do not appear on Microsoft's Windows 10 (22H2) or Windows 11 (24H2, 25H2) supported Intel processor lists, and no 26H2 list has been published. As a server processor it is mainly deployed with Windows Server and enterprise Linux distributions.

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