Intel Core i9-11900K + AMD Radeon RX 7800 XT
Will they bottleneck? Here’s the verdict at 1440p gaming — and how it shifts with resolution.
Intel Core i9-11900K
8c / 16t · 5.3 GHz · 125W
AMD Radeon RX 7800 XT
16 GB VRAM · 37.3 TFLOPS · 263W
1% CPU-bound. The Intel Core i9-11900K is holding back the AMD Radeon RX 7800 XT.
CPU limits 1440p performance — single-thread headroom is the constraint at this resolution.
GRADE
S
PSU MIN
700W
CONFIDENCE
86%
THE SHORT ANSWER
The Intel Core i9-11900K + AMD Radeon RX 7800 XT pairing is rated Grade S for 1440p gaming with a recommended 700W PSU. Resolution-by-resolution: 1080p: 4% CPU-bound, 1440p: 1% CPU-bound, 4K: balanced. CPU and GPU bottleneck verdicts depend on resolution — a pairing that is CPU-bound at 1080p is often perfectly balanced at 4K because the GPU does more work per frame as pixel count increases.
Engine accuracy: 21.6% MAE on measured FPS · methodology
Plain-English breakdown.
What this pairing actually means when you sit down to play.
The Intel Core i9-11900K + AMD Radeon RX 7800 XT pair is 1% CPU-limited at 1440p. That story changes at other resolutions — see the breakdown below. As a build, it grades elite-tier (S).
Expect around 335 FPS in League of Legends and ~91 in the more demanding Hogwarts Legacy — both at 1440p with high or ultra presets. Resolution matters more than most calculators show — the same parts give different verdicts at 1080p, 1440p, and 4K because GPU work scales with pixel count while CPU work is roughly fixed per frame.
If you upgrade the cpu, the Intel Core i5-14400F is the closest higher-tier option — see the swap recommendations below for the FPS lift. Plan on at least a 700W PSU — that includes headroom for transient spikes on the AMD Radeon RX 7800 XT.
The same pair gives a different answer at 1080p, 1440p, and 4K.
Higher resolutions push work onto the GPU — watch the balance shift.
1080P
4% CPU-bound
1440P
1% CPU-bound
4K
Balanced
Expected frame rates in 10 popular games.
At 1440p, high settings — measured where we have benchmarks, modeled otherwise.
- League of Legends335 fps · Estimated · low
- Apex Legends292 fps · Estimated · low
- Forza Horizon 5146 fps · Estimated · low
- The Witcher 3: Wild Hunt149 fps · Estimated · low
- Call of Duty: Warzone118 fps · Estimated · low
- Alan Wake 294 fps · Estimated · low
- Hogwarts Legacy91 fps · Estimated · low
- Starfield91 fps · Estimated · low
Compare similar builds.
Swap one part and see how the verdict moves.
These CPUs would unlock more of the AMD Radeon RX 7800 XT.
A better-matched processor closes the gap — closest tiers first.
Common questions.
Straight answers for the Intel Core i9-11900K + AMD Radeon RX 7800 XT.
Can the Intel Core i9-11900K run the AMD Radeon RX 7800 XT?
Yes, the Intel Core i9-11900K will run the AMD Radeon RX 7800 XT, but it's the limiting part — at 1440p the pair is 1% CPU-bound, so the Intel Core i9-11900K can't fully feed the AMD Radeon RX 7800 XT and you'll leave some frames on the table (most noticeable at 1080p and high-refresh). The swap suggestions below list CPUs that unlock more of the AMD Radeon RX 7800 XT.
Will the AMD Radeon RX 7800 XT bottleneck the Intel Core i9-11900K?
The Intel Core i9-11900K + AMD Radeon RX 7800 XT pairing is rated Grade S for 1440p gaming with a recommended 700W PSU. Resolution-by-resolution: 1080p: 4% CPU-bound, 1440p: 1% CPU-bound, 4K: balanced. CPU and GPU bottleneck verdicts depend on resolution — a pairing that is CPU-bound at 1080p is often perfectly balanced at 4K because the GPU does more work per frame as pixel count increases.
What PSU do I need for a Intel Core i9-11900K + AMD Radeon RX 7800 XT build?
For a Intel Core i9-11900K (125W TDP) paired with a AMD Radeon RX 7800 XT (263W TDP), we recommend a 700W power supply at minimum. This includes 40% headroom over the parts' combined TDP plus 100W for the motherboard, RAM, fans, and storage.
Run your own combination.
Swap in a different CPU, GPU, resolution, or use case and get a fresh verdict — in under 30 seconds.
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