Intel Core i5-10400F + NVIDIA GeForce RTX 3090
Will they bottleneck? Here’s the verdict at 1440p gaming — and how it shifts with resolution.
Intel Core i5-10400F
6c / 12t · 4.3 GHz · 65W
NVIDIA GeForce RTX 3090
24 GB VRAM · 35.6 TFLOPS · 350W
10% CPU-bound. The Intel Core i5-10400F is holding back the NVIDIA GeForce RTX 3090.
CPU limits 1440p performance — single-thread headroom is the constraint at this resolution.
GRADE
A
PSU MIN
750W
CONFIDENCE
77%
THE SHORT ANSWER
The Intel Core i5-10400F + NVIDIA GeForce RTX 3090 pairing is rated Grade A for 1440p gaming with a recommended 750W PSU. Resolution-by-resolution: 1080p: 12% CPU-bound, 1440p: 10% CPU-bound, 4K: 7% CPU-bound. 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 i5-10400F + NVIDIA GeForce RTX 3090 pair is 10% CPU-limited at 1440p. Same pattern at 1080p and 4K. As a build, it grades high-end (A).
Expect around 296 FPS in League of Legends and ~83 in the more demanding Starfield — 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 5 3600 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 NVIDIA GeForce RTX 3090.
The same pair gives a different answer at 1080p, 1440p, and 4K.
Higher resolutions push work onto the GPU — watch the balance shift.
1080P
12% CPU-bound
1440P
10% CPU-bound
4K
7% CPU-bound
Expected frame rates in 10 popular games.
At 1440p, high settings — measured where we have benchmarks, modeled otherwise.
- League of Legends296 fps · Estimated · low
- Apex Legends261 fps · Estimated · low
- Forza Horizon 5133 fps · Estimated · low
- The Witcher 3: Wild Hunt139 fps · Estimated · low
- Call of Duty: Warzone107 fps · Estimated · low
- Alan Wake 289 fps · Estimated · low
- Hogwarts Legacy84 fps · Estimated · low
- Starfield83 fps · Estimated · low
Compare similar builds.
Swap one part and see how the verdict moves.
These CPUs would unlock more of the NVIDIA GeForce RTX 3090.
A better-matched processor closes the gap — closest tiers first.
Common questions.
Straight answers for the Intel Core i5-10400F + NVIDIA GeForce RTX 3090.
Can the Intel Core i5-10400F run the NVIDIA GeForce RTX 3090?
Yes, the Intel Core i5-10400F will run the NVIDIA GeForce RTX 3090, but it's the limiting part — at 1440p the pair is 10% CPU-bound, so the Intel Core i5-10400F can't fully feed the NVIDIA GeForce RTX 3090 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 NVIDIA GeForce RTX 3090.
Will the NVIDIA GeForce RTX 3090 bottleneck the Intel Core i5-10400F?
The Intel Core i5-10400F + NVIDIA GeForce RTX 3090 pairing is rated Grade A for 1440p gaming with a recommended 750W PSU. Resolution-by-resolution: 1080p: 12% CPU-bound, 1440p: 10% CPU-bound, 4K: 7% CPU-bound. 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 i5-10400F + NVIDIA GeForce RTX 3090 build?
For a Intel Core i5-10400F (65W TDP) paired with a NVIDIA GeForce RTX 3090 (350W TDP), we recommend a 750W 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.
Affiliate links — we earn a small commission on Amazon purchases at no cost to you, which keeps the calculator free. Full disclosure.