Ryzen 9 5900X vs i9-11900K
The Ryzen 9 5900X is about 5% faster at 1440p. Whether that is worth it depends on the rest of your build.
The gap changes with resolution.
CPU differences shrink as resolution rises — at 4K the graphics card does most of the work.
| Resolution | Ryzen 9 5900X | i9-11900K | Difference |
|---|---|---|---|
| 1080p | 80 | 79 | +1% |
| 1440p | 80 | 76 | +5% |
| 4K | 80 | 74 | +8% |
In a real build with a RTX 3080.
Specs alone don’t tell you which to buy. Here is what each one does when it’s actually paired up, at 1440p.
| Game (1440p, paired with the RTX 3080) | Ryzen 9 5900X | i9-11900K |
|---|---|---|
| League of Legends | 310 fps | 303 fps |
| Counter-Strike 2 | 267 fps | 261 fps |
| Grand Theft Auto V | 132 fps | 130 fps |
| Elden Ring | 108 fps | 106 fps |
| Cyberpunk 2077 | 82 fps | 81 fps |
| Starfield | 82 fps | 81 fps |
Modelled from benchmark data, not measured for every pairing. Our published error rate is 21.6% mean absolute error.
So which should you buy?
The Ryzen 9 5900X — it is 5% ahead at 1440p for about $10 more, and it holds that lead in the pairings above.
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Common questions.
Straight answers on the Ryzen 9 5900X versus the i9-11900K.
Is the Ryzen 9 5900X better than the i9-11900K?
Yes, but by less than the spec sheet suggests. At 1440p the Ryzen 9 5900X scores 80 against 76 for the i9-11900K — roughly 5% faster. It also costs about $10 more at MSRP, so the question is whether that gap is worth the money for your build.
Does the Ryzen 9 5900X or i9-11900K bottleneck a RTX 3080?
Paired with a RTX 3080 at 1440p, the Ryzen 9 5900X build comes out balanced, and the i9-11900K build comes out balanced. Being GPU-bound is the healthy outcome — it means the graphics card is the part working hardest.
Is it worth upgrading from the i9-11900K to the Ryzen 9 5900X?
Only if you are also lifting the rest of the build. The Ryzen 9 5900X is about 5% ahead at 1440p, and gaps like that shrink further at 4K where the GPU does more of the work. If you are upgrading from the i9-11900K purely for frames, check the pairing first.
Which is better value, the Ryzen 9 5900X or the i9-11900K?
On performance per dollar at MSRP, the Ryzen 9 5900X wins. The Ryzen 9 5900X lists at $549 for an index of 80, and the i9-11900K at $539 for 76.
Check either one against your build.
Pick a CPU and its counterpart, and get a verdict at all three resolutions in under 30 seconds.