AMD EPYC 7643 48-core server processor 2.3 GHz 256 MB L3 cache SP3 225 W 100-000000326

Server processor for dense compute

The AMD EPYC 7643 is a 48-core server CPU built on the Milan core for the SP3 socket. It delivers 96 threads at a 2.3 GHz base frequency and a 3.6 GHz maximum turbo. The processor includes 256 MB of L3 cache and supports eight channels of DDR4 3200 memory. With 128 lanes of PCI Express 4.0, it targets virtualisation hosts, database nodes and high-throughput workloads that benefit from high core density within a 225 W thermal envelope.

Platform requirements before purchase

Verify that the motherboard uses the SP3 socket and provides a BIOS version qualified for the EPYC 7003 series. The board must expose eight DDR4 memory channels and sufficient PCIe 4.0 lane wiring to exploit the 128 available lanes. Cooling is not included, so a solution rated for 225 W TDP is required. Ensure the chassis airflow and power delivery can sustain continuous operation at the rated thermal design power.

Upgrade path from earlier EPYC generations

This processor replaces first- or second-generation EPYC parts on the same SP3 platform when a core-count increase from 32 or fewer cores to 48 cores reduces licence costs or improves throughput per rack unit. The jump is worthwhile when workloads scale across 96 threads and can utilise the larger 256 MB L3 cache. Systems already qualified on DDR4 and PCIe 4.0 avoid a memory-technology transition while gaining higher frequency and Instructions Per Clock improvements.