Intel Xeon 6553P-B socket: BGA 4368

What the Xeon 6553P-B is

The Intel Xeon 6553P-B is a 36-core member of the Xeon 6 Granite Rapids-D soldered edge stack on BGA 4368. It runs 36 Performance-cores with Hyper-Threading for 72 threads at 2.6 GHz base with boost to 4.0 GHz, backed by 144 MB of cache and a 235 W TDP. Intel launched the P-B range in the first quarter of 2025 at a 2690 USD recommended price, built on Intel 3 for single-socket edge servers.

Thirty-six cores suit network appliances, storage heads, factory servers and inference nodes where one dense soldered socket must do rack-class work. The 144 MB cache pool keeps table lookups and metadata near the cores across 4 DDR5 channels. At 235 W the part needs high-airflow or liquid-capable edge chassis with vendor-qualified heatsinks.

Against the 36-core Intel Xeon 6556P-B below it, the 6553P-B adds base frequency at a higher 235 W class. Against the 40-core Intel Xeon 6716P-B above it, the 6553P-B trims cores for a similar power envelope. 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 6553P-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 235 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 BGA 4368 is DDR5 ECC in 4 channels, up to 6400 MT/s on qualified boards for up to 1.13 TB. Four channels keep 72 threads supplied in firewall, storage and inference mixes. Some boards qualify at 5600 MT/s instead, so the vendor memory list governs exact speeds and population rules.

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 235 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 6553P-B starts with the 40-core Intel Xeon 6716P-B for more cores on BGA 4368 boards where power and cooling allow. The 36-core Intel Xeon 6556P-B below it keeps the same cores at lower clocks for the 215 W class. Each move needs a board and BIOS that already support Granite Rapids-D.

A move to BGA 5026 is a different soldered platform with 64 cores and 8 memory channels for denser nodes. A move to LGA 4710 is a different socketed platform with dual-socket topologies. Both changes replace board, memory and cooling from scratch.