Will the Ryzen 7 3700X bottleneck the RX 7900 GRE?

Yes, at 1440p the Ryzen 7 3700X is estimated to limit the RX 7900 GRE by about 25%. The effect is larger at 1080p and smaller at 4K. This is a model estimate from performance indexes, not a measured FPS loss.

What power supply do I need for a Ryzen 7 3700X and RX 7900 GRE?

Sustained gaming load is about 405 W using the RX 7900 GRE's measured draw. A 650 W unit is the safe choice.

Is this pair better at 1080p or 4K?

1080p: CPU-limited 31% (moderate CPU bottleneck). 1440p: CPU-limited 25% (mild CPU bottleneck). 4K: CPU-limited 5% (balanced).

PCPairs

Ryzen 7 3700X + RX 7900 GRE: bottleneck check

25%

CPU-limited at 1440p. Mild CPU bottleneck.

CPU GPU

The Ryzen 7 3700X cannot feed the RX 7900 GRE fast enough at 1440p, so the card sits partly idle in CPU-heavy games.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	CPU	31%	moderate CPU bottleneck
1440p	CPU	25%	mild CPU bottleneck
4K	CPU	5%	balanced

The Ryzen 7 3700X is the limiting part at every resolution, even at 4K (5%). The RX 7900 GRE is a much stronger card than this processor can drive — plan a CPU upgrade before spending more on graphics.

Specifications

AMD Ryzen 7 3700X
Cores / threads	8 / 16
Max boost	4.4 GHz
Socket	AM4
Power used for the PSU estimate	65 W not confirmed against a manufacturer page
Released	2019
Gaming index	52 / 100
Multi-core index	50 / 100

AMD Radeon RX 7900 GRE
VRAM	16 GB
Board power	260 W
Released	2024
1080p index	54.5 / 100
1440p index	49 / 100
4K index	44.0 / 100

Power supply

The RX 7900 GRE measured 265 W average while gaming (354 W highest 20 ms spike, TechPowerUp). With the Ryzen 7 3700X at a power figure of 65 W and about 75 W for the rest of the system, the sustained load is about 405 W. A 650 W unit is the safe choice. Details on the RX 7900 GRE PSU page or try other pairs in the PSU calculator.

Upgrade paths

CPUs that remove the bottleneck

AM4

Best CPU for the RX 7900 GRE Best GPU for the Ryzen 7 3700X RX 7900 GRE 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.