AMD EPYC 9455

With 48 cores and 96 threads, the EPYC 9455 is built for data center workloads that scale across many cores: virtualization hosts, container orchestration, databases, and web-tier fleets. Base clock of 3.15GHz with boost to 4.35GHz means per-thread performance trails the higher-clocked EPYC SKUs somewhat, trading it for core density. The 256MB L3 cache keeps per-core cache allocation reasonable for the socket.

The EPYC 9455 runs on AMD's SP5 platform with 12-channel DDR5 memory support and up to 128 PCIe 5.0 lanes per socket, giving it enormous memory bandwidth and I/O headroom for NVMe storage arrays and high-speed networking. It supports both single-socket (1P) and dual-socket (2P) server designs, giving system builders flexibility on scale. At 280W, it requires server-grade cooling: high-static-pressure fans and a chassis designed for sustained data-center airflow, not a repurposed desktop tower.

Compared to the higher core-count EPYC 9654 and EPYC 9754 in this catalog, the EPYC 9455 trades some core density for a lower power envelope and price, while staying on the same SP5 platform and 12-channel memory support. Against AMD's Threadripper PRO workstation lineup in this catalog, it adds true dual-socket scalability and higher memory bandwidth, at the cost of workstation-friendly single-socket simplicity. It lines up against Intel Xeon Scalable parts in this catalog at a similar core count, generally with a larger L3 cache and more PCIe lanes per socket.