Will the Ryzen 9 9900X bottleneck the RX 5700 XT?

No. At 1440p the RX 5700 XT is the limiting part, which is the normal state for a gaming PC. The Ryzen 9 9900X has headroom to spare.

What power supply do I need for a Ryzen 9 9900X and RX 5700 XT?

Estimated system load is about 445 W. A quality 650 W unit leaves roughly 30% headroom for transient spikes.

Is this pair better at 1080p or 4K?

1080p: GPU-limited 29% (GPU-bound (normal)). 1440p: GPU-limited 36% (GPU-bound (normal)). 4K: GPU-limited 51% (CPU overkill).

PCPairs

Ryzen 9 9900X + RX 5700 XT: bottleneck check

36%

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

CPU GPU

The RX 5700 XT is the part working hardest at 1440p, which is what you want. The Ryzen 9 9900X keeps about 36% in reserve.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	GPU	29%	GPU-bound (normal)
1440p	GPU	36%	GPU-bound (normal)
4K	GPU	51%	CPU overkill

The RX 5700 XT is the limit at every resolution and by a wide margin at 4K (51%). The Ryzen 9 9900X is overkill for this card: a faster GPU would give you far more frames than any CPU change.

Specifications

AMD Ryzen 9 9900X
Cores / threads	12 / 24
Max boost	5.6 GHz
Socket	AM5
Max turbo power	120 W
Released	2024
Gaming index	84 / 100
Multi-core index	90 / 100

AMD Radeon RX 5700 XT
VRAM	8 GB
Board power	225 W
Released	2019
1080p index	28.7 / 100
1440p index	23 / 100
4K index	18.4 / 100

Power supply

CPU 120 W + GPU 225 W + about 100 W for motherboard, memory, storage and fans gives an estimated peak load of 445 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

AM5

Cards that use the Ryzen 9 9900X fully

Best CPU for the RX 5700 XT Best GPU for the Ryzen 9 9900X RX 5700 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.