Will the Core i7-11700K bottleneck the RX 7900 XT?

Yes, at 1440p the Core i7-11700K is estimated to limit the RX 7900 XT by about 16%. The effect is larger at 1080p and smaller at 4K.

What power supply do I need for a Core i7-11700K and RX 7900 XT?

Estimated system load is about 540 W. A quality 750 W unit leaves roughly 30% headroom for transient spikes.

Is this pair better at 1080p or 4K?

1080p: CPU-limited 23% (mild CPU bottleneck). 1440p: CPU-limited 16% (mild CPU bottleneck). 4K: GPU-limited 6% (balanced).

PCPairs

Core i7-11700K + RX 7900 XT: bottleneck check

16%

CPU-limited at 1440p. Mild CPU bottleneck.

CPU GPU

The Core i7-11700K cannot feed the RX 7900 XT fast enough at 1440p, so the card sits partly idle in CPU-heavy games.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	CPU	23%	mild CPU bottleneck
1440p	CPU	16%	mild CPU bottleneck
4K	GPU	6%	balanced

This is the classic pattern: at 1080p the Core i7-11700K is the limit (23%), while at 4K the RX 7900 XT takes over (6% GPU-limited). If you play at 1080p on a high-refresh monitor, a faster CPU is the upgrade that matters; at 1440p or 4K this pair is already well matched.

Specifications

Intel Core i7-11700K
Cores / threads	8 / 16
Max boost	5.0 GHz
Socket	LGA1200
Max turbo power	125 W
Released	2021
Gaming index	62 / 100
Multi-core index	54 / 100

AMD Radeon RX 7900 XT
VRAM	20 GB
Board power	315 W
Released	2022
1080p index	62.0 / 100
1440p index	57 / 100
4K index	52.4 / 100

Power supply

CPU 125 W + GPU 315 W + about 100 W for motherboard, memory, storage and fans gives an estimated peak load of 540 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.

Best CPU for the RX 7900 XT Best GPU for the Core i7-11700K RX 7900 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.