Will the Core i7-10700K bottleneck the RX 7900 XTX?

Yes, at 1440p the Core i7-10700K is estimated to limit the RX 7900 XTX by about 27%. The effect is larger at 1080p and smaller at 4K.

What power supply do I need for a Core i7-10700K and RX 7900 XTX?

Estimated system load is about 580 W. A quality 850 W unit leaves roughly 30% headroom for transient spikes.

Is this pair better at 1080p or 4K?

1080p: CPU-limited 32% (moderate CPU bottleneck). 1440p: CPU-limited 27% (moderate CPU bottleneck). 4K: CPU-limited 8% (balanced).

PCPairs

Core i7-10700K + RX 7900 XTX: bottleneck check

27%

CPU-limited at 1440p. Moderate CPU bottleneck.

CPU GPU

The Core i7-10700K cannot feed the RX 7900 XTX fast enough at 1440p, so the card sits partly idle in CPU-heavy games.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	CPU	32%	moderate CPU bottleneck
1440p	CPU	27%	moderate CPU bottleneck
4K	CPU	8%	balanced

The Core i7-10700K is the limiting part at every resolution, even at 4K (8%). The RX 7900 XTX is a much stronger card than this processor can drive — plan a CPU upgrade before spending more on graphics.

Specifications

Intel Core i7-10700K
Cores / threads	8 / 16
Max boost	5.1 GHz
Socket	LGA1200
Max turbo power	125 W
Released	2020
Gaming index	58 / 100
Multi-core index	50 / 100

AMD Radeon RX 7900 XTX
VRAM	24 GB
Board power	355 W
Released	2022
1080p index	70.2 / 100
1440p index	66 / 100
4K index	62.0 / 100

Power supply

CPU 125 W + GPU 355 W + about 100 W for motherboard, memory, storage and fans gives an estimated peak load of 580 W. We recommend a 850 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.

Best CPU for the RX 7900 XTX Best GPU for the Core i7-10700K RX 7900 XTX PSU requirements

Compare nearby pairs

Same CPU, other GPUs

Same GPU, other CPUs

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