Core Ultra 9 285K vs Ryzen 9 9900X
Short answer: which is best?
Core Ultra 9 285K is 36.7 % stronger than Ryzen 9 9900X. Core Ultra 9 285K ranks #2 of 70 measured processors at WhatFPS (15,519 CPU score over 1 verified runs). Ryzen 9 9900X ranks #12 of 70 measured processors at WhatFPS (11,352 CPU score over 4 verified runs). The numbers are measured in 5 verified WhatFPS runs — not estimated, not self-reported.
Measured comparison
| Metric | Core Ultra 9 285K | Ryzen 9 9900X |
|---|---|---|
| CPU score (the processor's own performance) | 15,519 | 11,352 |
| Best rig (GAMING — whole PC) | 11,994 | 15,624 |
| Integer (MT) | 12.7 Gop/s | 8.4 Gop/s |
| Single-thread (1T) | 0.95 Gop/s | 0.81 Gop/s |
| Draw calls/s (DX11) | 11,963,538 | 13,496,334 |
| Cores / threads | 24 / 24 | 12 / 24 |
| L3 cache | 36 MB | 64 MB |
Fragz' verdict
The Core Ultra 9 285K takes the lead in this matchup, outperforming the Ryzen 9 9900X by a notable 25.9% in overall CPU score, though it's important to note the Core Ultra's score is based on a thin sample of just one verified run. Breaking down the numbers, the Core Ultra 9 285K shows stronger multi-threaded integer performance at 12.7 Gop/s compared to the Ryzen's 9.4 Gop/s, and a slight edge in single-thread performance at 0.95 Gop/s versus 0.89 Gop/s. This suggests better handling of background tasks, streaming, and compilation for the Core Ultra, which could translate to smoother overall system responsiveness. However, for raw gaming performance in some scenarios, the Ryzen 9 9900X pulls ahead, delivering significantly more draw calls per second at 15,180,900 and a higher Supernova DX11 FPS of 126.6, versus the Core Ultra's 11,963,538 draw calls per second and 99.8 FPS. If your primary focus is on titles that heavily leverage these specific DX11 metrics, the Ryzen 9 9900X might still offer a compelling experience despite its lower overall CPU score.
Generated September 21, 2026 from the 5 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 Core Ultra 9 285K · All measurements for Ryzen 9 9900X