Will the Core i5-12400F bottleneck the GTX 1080 Ti?

No. At 1440p the GTX 1080 Ti is the limiting part, which is the normal state for a gaming PC. The Core i5-12400F has headroom to spare.

What power supply do I need for a Core i5-12400F and GTX 1080 Ti?

Estimated system load is about 467 W. A quality 650 W unit leaves roughly 30% headroom for transient spikes.

Is this pair better at 1080p or 4K?

1080p: GPU-limited 10% (balanced). 1440p: GPU-limited 18% (balanced). 4K: GPU-limited 37% (GPU-bound (normal)).

PCPairs

Core i5-12400F + GTX 1080 Ti: bottleneck check

18%

Balanced at 1440p.

CPU GPU

Well matched at 1440p. The GTX 1080 Ti is the slightly busier part, by about 18%.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	GPU	10%	balanced
1440p	GPU	18%	balanced
4K	GPU	37%	GPU-bound (normal)

The GTX 1080 Ti is the limiting part at every resolution, which is the healthy direction, and the gap is small enough that neither part is wasted. Upgrade the GPU first when you want more frames.

Specifications

Intel Core i5-12400F
Cores / threads	6 / 12
Max boost	4.4 GHz
Socket	LGA1700
Max turbo power	117 W
Released	2022
Gaming index	66 / 100
Multi-core index	48 / 100

NVIDIA GeForce GTX 1080 Ti
VRAM	11 GB
Board power	250 W
Released	2017
1080p index	28.7 / 100
1440p index	23 / 100
4K index	18.4 / 100

Power supply

CPU 117 W + GPU 250 W + about 100 W for motherboard, memory, storage and fans gives an estimated peak load of 467 W. We recommend a 650 W unit (80 Plus Gold or better) so transient spikes from the graphics card stay inside the PSU's comfort zone. Try other pairs in the PSU calculator.

Upgrade paths

CPUs that remove the bottleneck

LGA1700

Cards that use the Core i5-12400F fully

Best CPU for the GTX 1080 Ti Best GPU for the Core i5-12400F GTX 1080 Ti PSU requirements

Same CPU, other cards

All

Same card, other CPUs

All

Indexes are relative estimates aggregated from published reviews; real results vary by game, settings, memory speed and drivers. Methodology.