Will the Core Ultra 5 245K bottleneck the RX 7800 XT?

No. At 1440p the RX 7800 XT is the limiting part, which is the normal state for a gaming PC. The Core Ultra 5 245K has headroom to spare.

What power supply do I need for a Core Ultra 5 245K and RX 7800 XT?

Estimated system load is about 522 W. A quality 750 W unit leaves roughly 30% headroom for transient spikes.

Is this pair better at 1080p or 4K?

1080p: GPU-limited 3% (balanced). 1440p: GPU-limited 11% (balanced). 4K: GPU-limited 30% (GPU-bound (normal)).

PCPairs

Core Ultra 5 245K + RX 7800 XT: bottleneck check

11%

Balanced at 1440p.

CPU GPU

Well matched at 1440p. The RX 7800 XT is the slightly busier part, by about 11%.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	GPU	3%	balanced
1440p	GPU	11%	balanced
4K	GPU	30%	GPU-bound (normal)

The RX 7800 XT is the limiting part at every resolution, which is the healthy direction, and the gap is small enough that neither part is wasted. Upgrade the GPU first when you want more frames.

Specifications

Intel Core Ultra 5 245K
Cores / threads	14 / 14
Max boost	5.2 GHz
Socket	LGA1851
Max turbo power	159 W
Released	2024
Gaming index	76 / 100
Multi-core index	78 / 100

AMD Radeon RX 7800 XT
VRAM	16 GB
Board power	263 W
Released	2023
1080p index	51.7 / 100
1440p index	46 / 100
4K index	40.9 / 100

Power supply

CPU 159 W + GPU 263 W + about 100 W for motherboard, memory, storage and fans gives an estimated peak load of 522 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.

Upgrade paths

CPUs that remove the bottleneck

LGA1851

Cards that use the Core Ultra 5 245K fully

Best CPU for the RX 7800 XT Best GPU for the Core Ultra 5 245K RX 7800 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.