13th Gen Core i9-13900K vs Ryzen 7 7800X3D
Short answer: which is best?
13th Gen Core i9-13900K is 39 % stronger than Ryzen 7 7800X3D. 13th Gen Core i9-13900K ranks #8 of 103 measured processors at WhatFPS (13,199 CPU score over 2 verified runs). Ryzen 7 7800X3D ranks #34 of 103 measured processors at WhatFPS (9,497 CPU score over 7 verified runs). The numbers are measured in 9 verified WhatFPS runs — not estimated, not self-reported.
Measured comparison
| Metric | 13th Gen Core i9-13900K | Ryzen 7 7800X3D |
|---|---|---|
| CPU score (the processor's own performance) | 13,199 | 9,497 |
| Best rig (GAMING — whole PC) | 10,782 | 13,434 |
| Integer (MT) | 12.5 Gop/s | 6.7 Gop/s |
| Single-thread (1T) | 0.88 Gop/s | 0.62 Gop/s |
| Draw calls/s (DX11) | 9,342,700 | 6,233,351 |
| Cores / threads | 24 / 32 | 8 / 16 |
| L3 cache | 36 MB | 96 MB |
Fragz' verdict
The 13th Gen Core i9-13900K secures a significant win, leading the Ryzen 7 7800X3D by 61.2% in its component score, though it's crucial to remember this verdict is based on a thin sample of one verified run for each CPU. This performance advantage is evident across key CPU tests, with the 13th Gen Core i9-13900K hitting 15 Gop/s in multi-threaded integer operations and a strong 0.89 Gop/s in single-thread tasks, alongside a much higher 116.4 Supernova DX11 FPS. Its 24 cores, 32 threads, and higher peak clock of 5233 MHz also translate into a vastly superior draw call rate of 13,964,310 per second, which is vital for maximizing frame rates in games. While the Ryzen 7 7800X3D features a significantly larger 96 MB of L3 cache compared to the 13th Gen Core i9-13900K's 36 MB, this did not translate to a lead in the CPU-specific gaming or performance tests measured here.
Generated September 29, 2026 from the 9 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 7800X3D