EPYC 9255

The EPYC 9255 is a 24-core / 48-thread processor based on the Turin (2024) architecture, manufactured on a 4 nm process node. It reaches a maximum boost clock of 4.8 GHz from a base frequency of 3.25 GHz— higher boost clocks directly translate to better single-threaded performance and responsiveness in gaming. With a massive 128 MB (total) L3 cache (3D V-Cache technology), this processor has a significant gaming advantage — the large cache drastically reduces memory latency in game engines., plus 1 MB (per core) of L2 cache and 80 kB (per core) of L1 cache per core. In the PassMark benchmark (a comprehensive multi-threaded test), it scores 75,809, placing it in the Enthusiast performance tier as a Recent generation product.

The EPYC 9255 fits into the SP5 socket and supports PCIe 5.0 with 128 total PCIe lanes for expansion cards and storage. It supports DDR5 memory at speeds up to 4800 (faster RAM improves bandwidth-sensitive workloads), with a maximum capacity of 6144 across 12 channels (dual-channel doubles bandwidth). It supports ECC memory, providing error-correcting capabilities — essential for mission-critical workloads and servers. Integrated graphics: None — allows display output without a dedicated GPU, useful for troubleshooting and light tasks.

It supports AVX-512 instructions — specialized SIMD operations that significantly accelerate AI inference, scientific computing, and video encoding workloads. Virtualization: VT-x, VT-d, SEV-SNP — enables running virtual machines efficiently (important for development and server workloads). Its primary market competitor is the Xeon Platinum 8480+.

The EPYC 9255 has a rated TDP (Thermal Design Power) of 200 Watt — this indicates the amount of heat generated under sustained load and determines what cooling solution is needed. No stock cooler is included — you will need to purchase an aftermarket cooler separately. Recommended cooling: Premium Server Cooler.

At an average price of $1,934 (MSRP: $2495), the EPYC 9255 delivers 39 PassMark points per dollar. Performance ranking position: #72 out of all indexed processors.