Ryzen 9 9900X vs i9-13900K
Too close to call. At 1440p there is only about 0% between them — buy whichever is cheaper.
The gap changes with resolution.
CPU differences shrink as resolution rises — at 4K the graphics card does most of the work.
| Resolution | Ryzen 9 9900X | i9-13900K | Difference |
|---|---|---|---|
| 1080p | 100 | 100 | 0% |
| 1440p | 100 | 100 | 0% |
| 4K | 100 | 100 | 0% |
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.
Ryzen 9 9900X + RTX 3080
4% GPU-bound
GPU is the limit — the healthy case, with CPU headroom to spare.
Full verdict for this pairing →i9-13900K + RTX 3080
4% GPU-bound
GPU is the limit — the healthy case, with CPU headroom to spare.
Full verdict for this pairing →| Game (1440p, paired with the RTX 3080) | Ryzen 9 9900X | i9-13900K |
|---|---|---|
| League of Legends | 343 fps | 343 fps |
| Counter-Strike 2 | 298 fps | 298 fps |
| Grand Theft Auto V | 144 fps | 144 fps |
| Elden Ring | 114 fps | 114 fps |
| Cyberpunk 2077 | 88 fps | 88 fps |
| Starfield | 89 fps | 89 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?
Whichever is cheaper on the day. There is roughly 0% between them at 1440p, which you will not notice in a game.
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Common questions.
Straight answers on the Ryzen 9 9900X versus the i9-13900K.
Is the Ryzen 9 9900X better than the i9-13900K?
They are close enough to call a tie. At 1440p the Ryzen 9 9900X scores 100 on our index against 100 for the i9-13900K — a gap of about 0%, which is inside the margin where you would not feel a difference while gaming. Buy whichever is cheaper or easier to find.
Does the Ryzen 9 9900X or i9-13900K bottleneck a RTX 3080?
Paired with a RTX 3080 at 1440p, the Ryzen 9 9900X build comes out 4% GPU-bound, and the i9-13900K build comes out 4% GPU-bound. Being GPU-bound is the healthy outcome — it means the graphics card is the part working hardest.
Is it worth upgrading from the i9-13900K to the Ryzen 9 9900X?
No. A 0% index gap will not be visible in games, and the money is better spent on the other side of the build — usually the GPU.
Which is better value, the Ryzen 9 9900X or the i9-13900K?
On performance per dollar at MSRP, the Ryzen 9 9900X wins. The Ryzen 9 9900X lists at $499 for an index of 100, and the i9-13900K at $589 for 100.
Check either one against your build.
Pick a CPU and its counterpart, and get a verdict at all three resolutions in under 30 seconds.