Will the Core i7-12700K bottleneck the RX 7800 XT?

No. At 1440p the RX 7800 XT is the limiting part, which is the normal state for a gaming PC. The Core i7-12700K has headroom to spare.

What power supply do I need for a Core i7-12700K and RX 7800 XT?

Estimated system load is about 553 W. A quality 750 W unit leaves roughly 30% headroom for transient spikes.

Is this pair better at 1080p or 4K?

1080p: GPU-limited 2% (balanced). 1440p: GPU-limited 10% (balanced). 4K: GPU-limited 29% (GPU-bound (normal)).

PCPairs

Core i7-12700K + RX 7800 XT: bottleneck check

10%

Balanced at 1440p.

CPU GPU

Well matched at 1440p. The RX 7800 XT is the slightly busier part, by about 10%.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	GPU	2%	balanced
1440p	GPU	10%	balanced
4K	GPU	29%	GPU-bound (normal)

The RX 7800 XT 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 i7-12700K
Cores / threads	12 / 20
Max boost	5.0 GHz
Socket	LGA1700
Max turbo power	190 W
Released	2021
Gaming index	75 / 100
Multi-core index	72 / 100

AMD Radeon RX 7800 XT
VRAM	16 GB
Board power	263 W
Released	2023
1080p index	51.7 / 100
1440p index	46 / 100
4K index	40.9 / 100

Power supply

CPU 190 W + GPU 263 W + about 100 W for motherboard, memory, storage and fans gives an estimated peak load of 553 W. We recommend a 750 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 i7-12700K fully

Best CPU for the RX 7800 XT Best GPU for the Core i7-12700K RX 7800 XT 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.