BOTTLENECK PAIR · GAMING · 1440P HEADLINE
Intel Core i5-12400F + AMD Radeon RX 7900 XTX
// VERDICT · 1440P GAMING
2% CPU-bound. The Intel Core i5-12400F is holding back the AMD Radeon RX 7900 XTX.
CPU limits 1440p performance — single-thread headroom is the constraint at this resolution.
TL;DRThe Intel Core i5-12400F + AMD Radeon RX 7900 XTX pairing is rated Grade S for 1440p gaming with a recommended 750W PSU. Resolution-by-resolution: 1080p: 5% CPU-bound, 1440p: 2% 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.
GRADE
S
PSU MIN
750W
CONFIDENCE
95%
Engine accuracy: 21.6% mean absolute error on measured FPS, see methodology.
// WHAT THIS PAIRING MEANS FOR YOUR GAMING
Plain-English breakdown.
The Intel Core i5-12400F + AMD Radeon RX 7900 XTX pair is 2% CPU-limited at 1440p. That story changes at other resolutions — see the breakdown below. As a build, it grades elite-tier (S).
Expect around 336 FPS in League of Legends and ~119 in the more demanding Baldur's Gate 3 — 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 AMD Ryzen 7 5800X3D is the closest higher-tier option — see the swap recommendations below for the FPS lift. Plan on at least a 750W PSU — that includes headroom for transient spikes on the AMD Radeon RX 7900 XTX.
// HOW THE VERDICT CHANGES WITH RESOLUTION
The same pair gives a different answer at 1080p, 1440p, and 4K.
// 1080P GAMING
5% CPU-bound
CPU
77
GPU
100
// 1440P GAMING
2% CPU-bound
CPU
74
GPU
100
// 4K GAMING
Balanced
CPU
71
GPU
100
// PREDICTED FPS · 1440P
Expected frame rates in 10 popular games.
- League of Legends336EST. LOW
- Valorant334EST. LOW
- Counter-Strike 2286EST. LOW
- Fortnite248EST. LOW
- Baldur's Gate 3119EST. LOW
// RELATED PAIRS
Compare similar builds.
Other GPUs paired with the Intel Core i5-12400F
Other CPUs paired with the AMD Radeon RX 7900 XTX
// SWAP THE CPU FOR A BETTER MATCH
These CPUs would unlock more of the AMD Radeon RX 7900 XTX.
// RUN A CUSTOM ANALYSIS
Want to swap in a different CPU, GPU, resolution, or use case? Open the PC bottleneck calculator to run any combination.
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// PRICE CHECK
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