13th Gen Core i9-13900K vs 11th Gen Core i5-11400 @ 2.60GHz
Short answer: which is best?
13th Gen Core i9-13900K is 89.9 % stronger than 11th Gen Core i5-11400 @ 2.60GHz. 13th Gen Core i9-13900K ranks #8 of 102 measured processors at WhatFPS (13,199 CPU score over 2 verified runs). 11th Gen Core i5-11400 @ 2.60GHz ranks #64 of 102 measured processors at WhatFPS (6,951 CPU score over 4 verified runs). The numbers are measured in 6 verified WhatFPS runs — not estimated, not self-reported.
Measured comparison
| Metric | 13th Gen Core i9-13900K | 11th Gen Core i5-11400 @ 2.60GHz |
|---|---|---|
| CPU score (the processor's own performance) | 13,199 | 6,951 |
| Best rig (GAMING — whole PC) | 10,782 | 5,940 |
| Integer (MT) | 12.5 Gop/s | 4.9 Gop/s |
| Single-thread (1T) | 0.88 Gop/s | 0.53 Gop/s |
| Draw calls/s (DX11) | 9,342,700 | 8,386,736 |
| Cores / threads | 24 / 32 | 6 / 12 |
| L3 cache | 36 MB | 12 MB |
Fragz' verdict
The 13th Gen Core i9-13900K is the clear winner here, outperforming the 11th Gen Core i5-11400 @ 2.60GHz by a massive 100.4% in overall CPU score. This lead is driven by significantly higher single-thread performance (0.88 Gop/s vs 0.52 Gop/s), which is crucial for game FPS ceilings, and a much stronger multi-threaded integer performance (12.5 Gop/s vs 4.5 Gop/s) that benefits streaming and background tasks. The i9 also boasts substantially more cores (24 vs 6), threads (32 vs 12), L3 cache (36MB vs 12MB), and a higher peak clock speed (6119 MHz vs 4319 MHz), resulting in better draw calls per second and higher Supernova DX11 FPS. It's worth noting that the 13th Gen Core i9-13900K's results are based on a thin sample of only two verified runs, so there's some uncertainty. For gamers on a tighter budget, the 11th Gen Core i5-11400 @ 2.60GHz, while clearly outclassed, still delivers decent Supernova DX11 FPS and could be a reasonable choice if raw performance isn't the absolute top priority.
Generated October 31, 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 11th Gen Core i5-11400 @ 2.60GHz