Intel Xeon 6756P-B socket: BGA 5026

What the Xeon 6756P-B is

The Intel Xeon 6756P-B is one of two 64-core flagships of the Xeon 6 Granite Rapids-D soldered edge stack on BGA 5026. It runs 64 Performance-cores with Hyper-Threading for 128 threads at 2.2 GHz base with boost to 3.5 GHz and 3.3 GHz all-core turbo, backed by 256 MB of cache and a 325 W TDP. Intel launched the pair in December 2025 at a 4469 USD recommended price, built on Intel 3 for single-socket dense servers.

Sixty-four cores suit storage heads, telco clouds, inference clusters and consolidation hosts where one soldered socket must do rack-class work. The 256 MB cache pool keeps large tables near the cores across 8 DDR5 channels. At 325 W the part needs high-airflow or liquid-capable chassis with vendor-qualified heatsinks and an 85 degree case budget.

Against the 64-core Intel Xeon 6766P-B twin beside it, the 6756P-B trades base frequency for a higher 325 W envelope with stronger all-core turbo. Against the 40-core parts on BGA 4368 below it, the 6756P-B adds 24 cores and doubles the memory channels. Zero UPI links confirm single-socket-only topologies. See Socket vs chipset: what decides whether a CPU works for how socket, platform and firmware fit together on server boards.

Socket and motherboard compatibility

The 6756P-B fits BGA 5026, a 5,026-ball soldered package measuring 77.5 × 56.5 mm. The chip is soldered once at the factory and stays with the board for life, so there is no retention mechanism and no aftermarket mounting choice. Cooling is part of the board design for the 325 W class with an 85 degree case limit.

Board choice follows the server vendor list for dense Granite Rapids-D systems. Memory is 8-channel DDR5 ECC fixed per board, and expansion rides on 32 Gen 5 plus 16 Gen 4 PCIe lanes. A board revision needs firmware that knows the Granite Rapids-D stepping. Moving from any other socket is a full platform change with board, memory and heatsinks replaced together.

Memory, PCIe and cooling

Memory on BGA 5026 is DDR5 ECC in 8 channels, up to 6400 MT/s for up to 2.25 TB. Eight channels at these rates keep 128 threads supplied in storage, telco and inference mixes. Population order and maximum capacity vary by board, so the vendor memory list governs every build.

PCI Express connectivity is Gen 5 with x32 lanes plus Gen 4 with x16 lanes from the CPU. That lane budget feeds NVMe fleets, 100-gigabit and faster networking and accelerators on a dense single-socket node. AVX-512 with two FMA ports and DL Boost accelerate inference where the workload uses them.

Cooling follows the board vendor list for the 325 W class with high-airflow or liquid heatsinks. No cooler ships with the tray server part. Firmware power limits can cap draw below the default where a cabinet demands it, at some cost in sustained clocks.

Upgrade paths

On the same package, the side move from the 6756P-B is the 64-core Intel Xeon 6766P-B twin for higher base clocks at the lower 305 W class on BGA 5026 boards where power allows. There is no larger soldered part above the pair, so further growth means adding nodes.

The step down to BGA 4368 40-core parts trims cores and channels for lower power and cost. A move to LGA 4710 is a different socketed platform with dual-socket topologies. Both changes replace board, memory and cooling from scratch.