13th Gen Core i9-13900K vs Core i5-10400F
Short answer: which is best?
13th Gen Core i9-13900K is 98.4 % stronger than Core i5-10400F. 13th Gen Core i9-13900K ranks #8 of 75 measured processors at WhatFPS (13,199 CPU score over 2 verified runs). Core i5-10400F ranks #53 of 75 measured processors at WhatFPS (6,654 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 | Core i5-10400F |
|---|---|---|
| CPU score (the processor's own performance) | 13,199 | 6,654 |
| Best rig (GAMING — whole PC) | 10,782 | 2,200 |
| Integer (MT) | 12.5 Gop/s | 4 Gop/s |
| Single-thread (1T) | 0.88 Gop/s | 0.46 Gop/s |
| Draw calls/s (DX11) | 9,342,700 | 7,533,227 |
| Cores / threads | 24 / 32 | 6 / 12 |
| L3 cache | 36 MB | 12 MB |
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 Core i5-10400F