13th Gen Core i9-13900K vs Ryzen 9 5900HX with Radeon Graphics
Short answer: which is best?
13th Gen Core i9-13900K is 78.1 % stronger than Ryzen 9 5900HX with Radeon Graphics. 13th Gen Core i9-13900K ranks #5 of 107 measured processors at WhatFPS (14,605 CPU score in its best run — best of 3 rigs, 3 verified runs). Ryzen 9 5900HX with Radeon Graphics ranks #53 of 107 measured processors at WhatFPS (8,200 CPU score in its best run — 1 rig, 4 verified runs). Each part is shown at its best run, picked from 7 verified WhatFPS runs — measured, not estimated, not self-reported.
Measured comparison
| Metric | 13th Gen Core i9-13900K | Ryzen 9 5900HX with Radeon Graphics |
|---|---|---|
| CPU score, best run (the processor's own performance) | 14,605 | 8,200 |
| Best rig (GAMING — whole PC) | 13,170 | 6,106 |
| Integer (MT) | 15 Gop/s | 5.7 Gop/s |
| Single-thread (1T) | 0.88 Gop/s | 0.55 Gop/s |
| Draw calls/s (DX11) | 11,749,277 | 9,312,338 |
| Cores / threads | 24 / 32 | 8 / 16 |
| L3 cache | 36 MB | 16 MB |
Fragz' verdict
The 13th Gen Core i9-13900K decisively beats the Ryzen 9 5900HX with Radeon Graphics, leading by 82% in overall CPU score, though we only have one verified run for the 13th Gen Core i9-13900K, making the sample thin. This substantial lead is primarily driven by its superior single-thread performance, hitting 0.89 Gop/s compared to the Ryzen’s 0.54 Gop/s, which is critical for achieving higher frame rates in many games. Furthermore, the 13th Gen Core i9-13900K delivers a much stronger multi-thread integer test score of 15 Gop/s versus 5.5 Gop/s, meaning smoother background tasks and better handling of draw calls per second, reflected in its 116.4 FPS in the Supernova DX11 scene compared to the Ryzen's 71.8 FPS, backed by more cores, threads, and L3 cache. For gamers seeking peak CPU performance and a higher FPS ceiling, the 13th Gen Core i9-13900K provides a significant uplift across all relevant CPU metrics.
Generated October 1, 2026 from the 7 verified runs available then. The verdict is never silently rewritten — new numbers get a new verdict.
What the numbers mean
The headline score is the part's best measured run, and the measurements under it come from that same run. It shows what the part has been proven to do — not what an average rig gets out of it. 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 5900HX with Radeon Graphics