Will the Ryzen 7 5800X3D bottleneck the Arc A750?

No. At 1440p the Arc A750 is the limiting part, which is the normal state for a gaming PC. The Ryzen 7 5800X3D 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 7 5800X3D and Arc A750?

Sustained gaming load is about 383 W using the Arc A750's measured draw. A 550 W unit is the safe choice.

Is this pair better at 1080p or 4K?

1080p: GPU-limited 24% (GPU-bound (normal)). 1440p: GPU-limited 31% (GPU-bound (normal)). 4K: GPU-limited 47% (CPU overkill).

PCPairs

Ryzen 7 5800X3D + Arc A750: bottleneck check

31%

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

CPU GPU

The Arc A750 is the part working hardest at 1440p, which is what you want. The Ryzen 7 5800X3D keeps about 31% in reserve.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	GPU	24%	GPU-bound (normal)
1440p	GPU	31%	GPU-bound (normal)
4K	GPU	47%	CPU overkill

The Arc A750 is the limit at every resolution and by a wide margin at 4K (47%). The Ryzen 7 5800X3D is overkill for this card: a faster GPU would give you far more frames than any CPU change.

Specifications

AMD Ryzen 7 5800X3D
Cores / threads	8 / 16
Max boost	4.5 GHz
Socket	AM4
TDP	105 W manufacturer-published TDP — sustained turbo can be higher · AMD
Released	2022
Gaming index	78 / 100
Multi-core index	59 / 100

Intel Arc A750
VRAM	8 GB
Board power	225 W
Released	2022
1080p index	28.7 / 100
1440p index	23 / 100
4K index	18.4 / 100

Power supply

The Arc A750 measured 203 W average while gaming (255 W highest 20 ms spike, TechPowerUp). With the Ryzen 7 5800X3D at its TDP of 105 W and about 75 W for the rest of the system, the sustained load is about 383 W. A 550 W unit is the safe choice. Details on the Arc A750 PSU page or try other pairs in the PSU calculator.

Upgrade paths

CPUs that remove the bottleneck

AM4

Cards that use the Ryzen 7 5800X3D fully

Best CPU for the Arc A750 Best GPU for the Ryzen 7 5800X3D Arc A750 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.