AMD EPYC 7501 socket: SP3

What the EPYC 7501 is

The EPYC 7501 is a thirty two core, sixty four thread server processor from Naples. It launched on June 20, 2017 with a 2.0 GHz base and up to 3.0 GHz boost at 170 W. Thirty two cores cover dense virtual hosts where thread count decides consolidation ratios.

Sixty four megabytes of L3 cache spread across four dies feed many virtual machines. The lower 2.0 GHz base reflects the 32 core layout in a 170 W envelope, which trims power against the 180 W 7551 with the same clocks. Boost to 3.0 GHz lifts lightly threaded management tasks.

No integrated graphics ship on Naples, so remote management uses board controllers. ECC DDR4 with RDIMM and LRDIMM support is required for data center uptime. The multiplier stays locked for fleet consistency.

AMD aimed the 7501 at cost aware clouds that need 32 cores without flagship pricing. It sits below the 7551 and 7601 on clocks and TDP. Four dies with eight cores each define the Naples layout.

Socket and motherboard compatibility

The 7501 fits SP3 in single and dual socket boards. Makers list Naples SKUs by board revision, so check the CPU support page before ordering used parts. Dual socket pairs scale to 64 cores per node.

Boards wire eight memory channels and 128 PCIe lanes per socket for storage heavy designs. Vendor heatsinks for 170 W with front to back airflow suit 2U chassis. The Socket vs chipset: what decides whether a CPU works guide covers server board matching.

The 24 core AMD EPYC 7451 is the nearby lower core option on the same boards. The 32 core 7551 class adds TDP headroom for higher sustained clocks.

Memory, PCIe and cooling

DDR4-2666 in eight channels up to 2 TB per socket is the memory design. Population order follows the board manual with primary slots first. ECC stays enabled for error cover in virtual hosts.

PCIe 3.0 with 128 lanes per CPU handles NICs, accelerators and NVMe. Bifurcation options vary by board, so confirm retimer needs early. SATA devices hang off spare lanes where boards wire them.

Cooling follows SP3 practice with a carrier slide and three screws torqued in order. One hundred seventy watt parts need high flow 2U air paths. Altitude and inlet heat derate sustained boost.

Upgrade paths

On SP3 the move up is the 7551 or 7601 for higher clocks, keeping board and DDR4. Some Rome boards accept Milan with a BIOS update, which extends SP3 life where makers support it.

Past SP3 the jump is SP5 with DDR5 and Gen5 lanes. Most owners add DIMMs or NICs before new CPUs. Used 7501 nodes suit labs where 32 cores balance price and lanes.