Intel Xeon 6533P-B socket: BGA 4368

What the Xeon 6533P-B is

The Intel Xeon 6533P-B is a 32-core member of the Xeon 6 Granite Rapids-D soldered edge stack on BGA 4368. It runs 32 Performance-cores with Hyper-Threading for 64 threads at 2.2 GHz base with boost to 3.9 GHz, backed by 128 MB of cache and a 205 W TDP. Intel launched the P-B range in February 2025 at a 2010 USD recommended price, built on Intel 3 for single-socket edge servers.

Thirty-two cores with a 3.9 GHz boost suit network appliances, storage heads and inference nodes that need higher burst clocks than the earlier 32-core parts. The 2.2 GHz base keeps sustained draw inside the 205 W class, while the top boost in the 32-core band clears latency-sensitive bursts. The 128 MB cache pool keeps table lookups near the cores.

Against the 32-core Intel Xeon 6546P-B below it, the 6533P-B adds boost frequency at a higher 205 W class. Against the 32-core Intel Xeon 6532P-B beside it, the two share clocks with different qualification timing. 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 6533P-B fits BGA 4368, a 4,368-ball soldered package measuring 77.5 × 50 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 205 W class with an 85 degree case limit.

Board choice follows the server vendor list for Granite Rapids-D edge systems. Memory is 4-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 this platform is DDR5 ECC in 4 channels, up to 5600 MT/s for up to 1.13 TB. Four channels keep 64 threads supplied in appliance, storage and inference mixes. Population order follows the board manual, and the vendor list governs exact DIMM types.

PCI Express connectivity is Gen 5 with x32 lanes plus Gen 4 with x16 lanes from the CPU. That lane budget feeds NVMe storage, 25 and 100-gigabit networking and accelerators on a single-socket edge 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 205 W class with vendor-qualified 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 path up from the 6533P-B starts with the 36-core Intel Xeon 6556P-B for more cores on BGA 4368 boards where power and cooling allow. The 32-core Intel Xeon 6532P-B beside it shares the same clocks with later qualification. Each move needs a board and BIOS that already support Granite Rapids-D.

The step down to the 32-core Intel Xeon 6546P-B trims boost for the 195 W class. A move to BGA 5026 is a different soldered platform with 64 cores and 8 memory channels for denser nodes. That change replaces board, memory and cooling from scratch.