13th Gen Core i9-13900K vs Ryzen 7 5800X3D
Short answer: which is best?
13th Gen Core i9-13900K is 47.1 % stronger than Ryzen 7 5800X3D. 13th Gen Core i9-13900K ranks #8 of 102 measured processors at WhatFPS (13,199 CPU score over 2 verified runs). Ryzen 7 5800X3D ranks #38 of 102 measured processors at WhatFPS (8,975 CPU score over 1 verified runs). The numbers are measured in 3 verified WhatFPS runs — not estimated, not self-reported.
Measured comparison
| Metric | 13th Gen Core i9-13900K | Ryzen 7 5800X3D |
|---|---|---|
| CPU score (the processor's own performance) | 13,199 | 8,975 |
| Best rig (GAMING — whole PC) | 10,782 | 7,355 |
| Integer (MT) | 12.5 Gop/s | 6.3 Gop/s |
| Single-thread (1T) | 0.88 Gop/s | 0.55 Gop/s |
| Draw calls/s (DX11) | 9,342,700 | 10,195,060 |
| Cores / threads | 24 / 32 | 8 / 16 |
| L3 cache | 36 MB | 96 MB |
Fragz' verdict
The 13th Gen Core i9-13900K is the clear winner here, leading the Ryzen 7 5800X3D by 47.1% in overall CPU score, though both components currently have a thin sample of verified runs. This performance gap is largely due to the Core i9's significantly higher multi-threaded integer performance of 12.5 Gop/s versus 6.3 Gop/s, which helps with background tasks and streaming, and its superior single-thread performance at 0.88 Gop/s, which typically sets the FPS ceiling in games. With more cores, threads, and a much higher peak clock speed, the Core i9-13900K is a powerhouse. However, the Ryzen 7 5800X3D isn't out entirely, showing a surprising lead in the Supernova DX11 scene with 85 FPS compared to 77.9 FPS, and pushing more draw calls per second. Its massive 96 MB L3 cache likely contributes to these gains, making it a strong contender for specific games that can truly leverage that extra cache.
Generated October 31, 2026 from the 3 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 7 5800X3D