13th Gen Core i9-13900K vs Ryzen 9 9900X

Short answer: which is best?

13th Gen Core i9-13900K is 16.3 % stronger than Ryzen 9 9900X. 13th Gen Core i9-13900K ranks #8 of 103 measured processors at WhatFPS (13,199 CPU score over 2 verified runs). Ryzen 9 9900X ranks #18 of 103 measured processors at WhatFPS (11,352 CPU score over 4 verified runs). The numbers are measured in 6 verified WhatFPS runs — not estimated, not self-reported.

Measured comparison

Fragz' verdict

The 13th Gen Core i9-13900K takes the overall CPU score lead over the Ryzen 9 9900X by 9.4%, though its sample size is quite thin with only two verified runs. This overall lead comes from its stronger multi-threaded integer performance of 12.5 Gop/s, higher single-thread performance at 0.88 Gop/s, and a higher peak clock of 6119 MHz, all crucial for overall CPU power and setting the FPS ceiling in games. However, the Ryzen 9 9900X demonstrates a significant advantage in specific DirectX 11 workloads, boasting 13,974,120 draw calls per second and an impressive 116.5 FPS in the Supernova DX11 scene. For gamers prioritizing those specific DX11 results, the Ryzen 9 9900X, with its larger 64 MB L3 cache, presents a compelling alternative.

Generated November 2, 2026 from the 6 verified runs available then. The verdict is never silently rewritten — new numbers get a new verdict.

What the numbers mean

The CPU score is the processor's own performance — that is what we rank on. GAMING is the whole rig's score in the best PC we measured the processor in, and leans heavily on the graphics card. A strong processor in a weak PC gets a low GAMING score without being worse. We show both and never mix them.

All numbers come from our benchmark suite: four hand-built 3D scenes written directly against the graphics APIs in Rust, the same load on every PC. The methodology is open at https://whatfps.com/metodik

All measurements for 13th Gen Core i9-13900K · All measurements for Ryzen 9 9900X