Will the Ryzen 7 5800X3D bottleneck the RX 6700 XT?

No. At 1440p the RX 6700 XT 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 RX 6700 XT?

Sustained gaming load is about 401 W using the RX 6700 XT's measured draw. A 650 W unit is the safe choice; a good-quality 550 W unit also covers it.

Is this pair better at 1080p or 4K?

1080p: GPU-limited 18% (balanced). 1440p: GPU-limited 25% (GPU-bound (normal)). 4K: GPU-limited 42% (CPU overkill).

PCPairs

Ryzen 7 5800X3D + RX 6700 XT: bottleneck check

25%

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

CPU GPU

The RX 6700 XT is the part working hardest at 1440p, which is what you want. The Ryzen 7 5800X3D keeps about 25% in reserve.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	GPU	18%	balanced
1440p	GPU	25%	GPU-bound (normal)
4K	GPU	42%	CPU overkill

The RX 6700 XT is the limit at every resolution and by a wide margin at 4K (42%). 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

AMD Radeon RX 6700 XT
VRAM	12 GB
Board power	230 W
Released	2021
1080p index	37.0 / 100
1440p index	31 / 100
4K index	26.0 / 100

Power supply

The RX 6700 XT measured 221 W average while gaming (321 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 401 W. A 650 W unit is the safe choice; a good-quality 550 W unit also covers the measured draw. Details on the RX 6700 XT 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 RX 6700 XT Best GPU for the Ryzen 7 5800X3D RX 6700 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.