Intel® Xeon™ 6766P-B

The Intel Xeon 6766P-B is a server processor with 64 cores and 128 threads, built on the Granite Rapids architecture. It launched in Oct 2025. Clocks run from 2.3 GHz base to 3.5 GHz boost. A 256-MB L3 cache backs the cores (4.0 MB per core). It addresses DDR5 memory up to 2304 GB across 8 channels. The chip drops into the FCBGA5026 socket and exposes PCIe 5.0 (48 lanes). Rated TDP is 305 W. Notable platform capabilities: AMX (Advanced Matrix Extensions), AMX, AVX-512, Extended Page Tables (EPT).

The Intel Xeon 6766P-B has 64 physical cores and runs 128 logical threads. It runs 2 threads per core. It runs at a base clock of 2.30 GHz and boosts up to 3.50 GHz.

The Intel Xeon 6766P-B is a server processor, belongs to the Intel Xeon 6 family, uses the Granite Rapids architecture and carries the codename Granite Rapids-D. It launched in Oct 2025.

The Intel Xeon 6766P-B has 256 MB of L3 cache. That adds up to about 256.0 MB of cache, or 4.00 MB per core. Feex has no recorded L1 cache size for this processor.

The Intel Xeon 6766P-B supports DDR5 memory, addresses up to 2,304 GB of memory and uses 8 memory channels. It does not support DDR4 and LPDDR memory.

The Intel Xeon 6766P-B does not include integrated graphics, so a discrete graphics card is required for display output.

The Intel Xeon 6766P-B uses the FCBGA5026 socket, supports PCI Express 5.0 and provides up to 48 PCIe lanes.

The Intel Xeon 6766P-B has a rated TDP of 305 W.

Instruction sets, security, virtualization, AI acceleration and OS readiness. Features are listed as supported, explicitly not supported, or not recorded; a feature that is not recorded is not the same as unsupported.

The Intel Xeon 6766P-B is manufactured by Intel. It launched at a price of $4,704.

The Intel Xeon 6766P-B is also identified by the model number 6766P-B.

After an audit, 1 value was corrected on the Intel Xeon 6766P-B record. Each change is listed with its old value, new value, rule and sources.

• PCIe revision: Gen4, Gen5 → 5.0. Rule: Cleanup pcie multi to max. normalize to the dominant "N.0" format.

The audit log is public: all changes for this CPU, the corrections overview and the method.

Feex has recorded 38% of the specifications it tracks for the Intel Xeon 6766P-B. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Efficiency Cores, Hybrid Architecture, All-Core Boost and Unlocked Multiplier. Architecture & Generation: ISA Family and Market Status. Cache: L1 Cache (Total), L2 Cache (Total), L2 Cache (per Core) and L4 Cache. Memory Support: Memory Bandwidth, ECC Memory and Max Memory Speed. Platform & Compatibility: Package and Package Size. Power & Thermals: Base Power, Maximum Turbo Power, Configurable TDP (Min), Configurable TDP (Max), Max Junction Temperature and Tcase. Physical & Manufacturing: Transistor Count, Die Size, Die Count and Foundry. Naming & Aliases: Normalized Name, SKU, Processor Number and Part Number. Performance: single-core and multi-core ratings and all computed performance metrics.

Processors close to the Intel Xeon 6766P-B in the Feex database, matched by socket, family, segment, architecture, core count, TDP and benchmark scores, include Intel Xeon 6741P, Intel Xeon 6745P, Intel Xeon 6747P, Intel Xeon 6740P and Intel Xeon 6781P.