Will the Ryzen 9 7900X bottleneck the RX 6750 XT?

No. At 1440p the RX 6750 XT is the limiting part, which is the normal state for a gaming PC. The Ryzen 9 7900X has headroom to spare. This is a model estimate from performance indexes, not a measured FPS loss.

What power supply do I need for a Ryzen 9 7900X and RX 6750 XT?

Sustained gaming load is about 531 W using the RX 6750 XT's measured draw. A 750 W unit is the safe choice.

Is this pair better at 1080p or 4K?

1080p: GPU-limited 19% (balanced). 1440p: GPU-limited 26% (GPU-bound (normal)). 4K: GPU-limited 43% (CPU overkill).

PCPairs

Ryzen 9 7900X + RX 6750 XT: bottleneck check

26%

GPU-limited at 1440p. GPU-bound (normal).

CPU GPU

The RX 6750 XT is the part working hardest at 1440p, which is what you want. The Ryzen 9 7900X keeps about 26% in reserve.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	GPU	19%	balanced
1440p	GPU	26%	GPU-bound (normal)
4K	GPU	43%	CPU overkill

The RX 6750 XT is the limit at every resolution and by a wide margin at 4K (43%). The Ryzen 9 7900X is overkill for this card: a faster GPU would give you far more frames than any CPU change.

Specifications

AMD Ryzen 9 7900X
Cores / threads	12 / 24
Max boost	5.6 GHz
Socket	AM5
TDP	170 W manufacturer-published TDP — sustained turbo can be higher · AMD
Released	2022
Gaming index	81 / 100
Multi-core index	86 / 100

AMD Radeon RX 6750 XT
VRAM	12 GB
Board power	250 W
Released	2022
1080p index	39.0 / 100
1440p index	33 / 100
4K index	27.9 / 100

Power supply

The RX 6750 XT measured 286 W average while gaming (407 W highest 20 ms spike, TechPowerUp). With the Ryzen 9 7900X at its TDP of 170 W and about 75 W for the rest of the system, the sustained load is about 531 W. A 750 W unit is the safe choice. Details on the RX 6750 XT PSU page or try other pairs in the PSU calculator.

Upgrade paths

CPUs that remove the bottleneck

AM5

Cards that use the Ryzen 9 7900X fully

Best CPU for the RX 6750 XT Best GPU for the Ryzen 9 7900X RX 6750 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.