Both are AMD CPUs on the same Zen architecture, but they are built for different jobs. Ryzen is tuned for speed per core, EPYC for many cores, a lot of memory and many PCIe devices.
Ryzen: speed per core
A Ryzen 9 9950X has 16 cores and boosts up to 5.7 GHz. Tasks that run on one or a few threads, such as game servers, PHP websites and many databases, finish faster on a high clock. The X3D models add a large L3 cache (128 MB on the 9950X3D), which helps games and simulations even more. Ryzen platforms have two memory channels; our Ryzen servers in Vienna and Berlin take up to 256 GB DDR5 ECC.
EPYC: cores, memory and lanes
EPYC server CPUs scale far beyond desktop limits. The EPYC 9004 and 9005 series offer 12 memory channels and 128 PCIe 5.0 lanes per socket, with up to 192 cores in the largest models. That makes them the right choice for virtualization with many VMs, large in-memory databases, and servers with many NVMe drives or network cards. Our high memory servers go up to 3 TB RAM.
Which one to pick
| Your project | Pick |
|---|---|
| Game servers (Minecraft, Rust, FiveM) | Ryzen 9 9950X3D or 9800X3D |
| Websites, shops, APIs | Ryzen 9 9950X or 9700X |
| Build servers, CI, rendering | Ryzen 9 9950X |
| Proxmox with many VMs | AMD EPYC, or a Ryzen with 128–256 GB for fewer VMs |
| Databases above 256 GB RAM | EPYC high memory |
| Storage with many NVMe drives | EPYC NVMe servers |