Will the Core Ultra 9 285K 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 Core Ultra 9 285K 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 Core Ultra 9 285K and RX 5700 XT?

Sustained gaming load is about 540 W using the RX 5700 XT's measured draw. A 750 W unit is the safe choice.

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).

Core Ultra 9 285K + 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 Core Ultra 9 285K 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 Core Ultra 9 285K is overkill for this card: a faster GPU would give you far more frames than any CPU change.

Specifications

Intel Core Ultra 9 285K
Cores / threads	24 / 24
Max boost	5.7 GHz
Socket	LGA1851
Maximum turbo power (MTP)	250 W Intel's published maximum sustained turbo power, above its base power; the PSU estimate uses it, so it errs high · Intel ARK
Released	2024
Gaming index	84 / 100
Multi-core index	97 / 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

The RX 5700 XT measured 215 W average while gaming (266 W highest 20 ms spike, TechPowerUp). With the Core Ultra 9 285K at its maximum turbo power of 250 W and about 75 W for the rest of the system, the sustained load is about 540 W. A 750 W unit is the safe choice. Details on the RX 5700 XT PSU page or try other pairs in the PSU calculator.

Upgrade paths

CPUs that remove the bottleneck

LGA1851

Cards that use the Core Ultra 9 285K fully

Best CPU for the RX 5700 XT Best GPU for the Core Ultra 9 285K 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.