Will the Ryzen 7 5700X3D bottleneck the RX 6600?

No. At 1440p the RX 6600 is the limiting part, which is the normal state for a gaming PC. The Ryzen 7 5700X3D 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 5700X3D and RX 6600?

Sustained gaming load is about 300 W using the RX 6600's measured draw. A 450 W unit is the safe choice.

Is this pair better at 1080p or 4K?

1080p: GPU-limited 22% (GPU-bound (normal)). 1440p: GPU-limited 29% (GPU-bound (normal)). 4K: GPU-limited 45% (CPU overkill).

PCPairs

Ryzen 7 5700X3D + RX 6600: bottleneck check

29%

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

CPU GPU

The RX 6600 is the part working hardest at 1440p, which is what you want. The Ryzen 7 5700X3D keeps about 29% in reserve.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	GPU	22%	GPU-bound (normal)
1440p	GPU	29%	GPU-bound (normal)
4K	GPU	45%	CPU overkill

The RX 6600 is the limit at every resolution and by a wide margin at 4K (45%). The Ryzen 7 5700X3D is overkill for this card: a faster GPU would give you far more frames than any CPU change.

Specifications

AMD Ryzen 7 5700X3D
Cores / threads	8 / 16
Max boost	4.1 GHz
Socket	AM4
Power used for the PSU estimate	105 W not confirmed against a manufacturer page
Released	2024
Gaming index	74 / 100
Multi-core index	56 / 100

AMD Radeon RX 6600
VRAM	8 GB
Board power	132 W
Released	2021
1080p index	26.5 / 100
1440p index	21 / 100
4K index	16.6 / 100

Power supply

The RX 6600 measured 120 W average while gaming (249 W highest 20 ms spike, TechPowerUp). With the Ryzen 7 5700X3D at a power figure of 105 W and about 75 W for the rest of the system, the sustained load is about 300 W. A 450 W unit is the safe choice. Details on the RX 6600 PSU page or try other pairs in the PSU calculator.

Upgrade paths

CPUs that remove the bottleneck

AM4

Cards that use the Ryzen 7 5700X3D fully

Best CPU for the RX 6600 Best GPU for the Ryzen 7 5700X3D RX 6600 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.