AMD EPYC 9254 socket: SP5

What the EPYC 9254 is

The AMD EPYC 9254 is the 24-core member of the 4th Gen EPYC family for SP5 boards from November 2022. 24 Zen 4 cores with simultaneous multithreading give 24 cores and 48 threads, with base at 2.9 GHz and up to 4.15 GHz boost. The package carries 128 MB of L3. The 200 W envelope with a 200 to 240 W configurable window fits standard server heatsinks with front to back airflow.

DDR5 up to 4800 MT/s, ECC RDIMM, 12 channels, up to 6 TB per socket with ECC feed the cores, and matched DIMMs hold the rated speed. One hundred twenty eight Gen5 lanes per socket wire NICs, accelerators and NVMe. Boards run one or two sockets with the same memory and IO per CPU.

High clock servers for latency sensitive work take this 24-core part with 4.15 GHz boost, where per core speed matters more than dense packing. Boards need an SP5 platform with the EPYC 9254 on the support list. The Socket vs chipset: what decides whether a CPU works guide covers server board choice, and AMD EPYC Embedded 9254 is the embedded counterpart on the same socket.

Socket and motherboard compatibility

The 9254 fits SP5 on single and dual socket server boards with LGA 6096 retention and server power delivery. Board lists must name the EPYC 9254 part for qualification.

Platform choice decides management and IO breadth rather than CPU fit. Boards carry BMC management, multiple NICs and NVMe backplanes for this power class. A BIOS that lists Genoa from November 2022 covers the part, while early firmware may need an update for specific stepping IDs. Check the board list before mixing this SKU with other steppings.

Memory, PCIe and cooling

DDR5 up to 4800 MT/s, ECC RDIMM, 12 channels, up to 6 TB per socket with ECC feed the cores, and matched RDIMMs hold the rated speed. Population with matched DIMMs holds the rated speed, and twelve channel operation needs one DIMM per channel at minimum for full bandwidth. Capacity reaches 6 TB per socket with high density DIMMs.

One hundred twenty eight Gen5 lanes per socket wire NICs, accelerators and NVMe. Lane bifurcation follows board firmware, so slot population rules come from the board manual.

The 200 W envelope needs a server heatsink with front to back airflow and a chassis with redundant fans. The large SP5 package uses a carrier with even mounting pressure. Paste and torque sequence follow the heatsink maker specification.

Upgrade paths

On SP5 the upward moves are higher core Genoa parts where VM counts grow, or adding a second EPYC 9254 socket where boards allow two socket operation. For this 24-core SKU, memory growth to full twelve channel population and NIC additions often help more than clocks.

Outside this SKU, AMD EPYC 9224 (EPYC 9224) on SP5 trims or adds cores for lighter or denser loads. Bergamo parts trade per core cache for thread density, while Turin parts move the platform to 5th Gen on the same socket. A move to another socket needs a new board and memory plan, so socket local growth comes first.