Will the Ryzen 5 8600G bottleneck the RTX 5090?

Yes, at 1440p the Ryzen 5 8600G is estimated to limit the RTX 5090 by about 36%. 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 5 8600G and RTX 5090?

Sustained gaming load is about 727 W using the RTX 5090's measured draw. A 1000 W unit is the safe choice.

Is this pair better at 1080p or 4K?

1080p: CPU-limited 40% (moderate CPU bottleneck). 1440p: CPU-limited 36% (moderate CPU bottleneck). 4K: CPU-limited 20% (mild CPU bottleneck).

PCPairs

Ryzen 5 8600G + RTX 5090: bottleneck check

36%

CPU-limited at 1440p. Moderate CPU bottleneck.

CPU GPU

The Ryzen 5 8600G cannot feed the RTX 5090 fast enough at 1440p, so the card sits partly idle in CPU-heavy games.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	CPU	40%	moderate CPU bottleneck
1440p	CPU	36%	moderate CPU bottleneck
4K	CPU	20%	mild CPU bottleneck

The Ryzen 5 8600G is the limiting part at every resolution, even at 4K (20%). The RTX 5090 is a much stronger card than this processor can drive — plan a CPU upgrade before spending more on graphics.

Specifications

AMD Ryzen 5 8600G
Cores / threads	6 / 12
Max boost	5.0 GHz
Socket	AM5
TDP	65 W manufacturer-published TDP — sustained turbo can be higher · AMD
Released	2024
Gaming index	64 / 100
Multi-core index	54 / 100

NVIDIA GeForce RTX 5090
VRAM	32 GB
Board power	575 W
Released	2025
1080p index	100.0 / 100
1440p index	100 / 100
4K index	100.0 / 100

Power supply

The RTX 5090 measured 587 W average while gaming (644 W highest 20 ms spike, TechPowerUp). With the Ryzen 5 8600G at its TDP of 65 W and about 75 W for the rest of the system, the sustained load is about 727 W. A 1000 W unit is the safe choice. Details on the RTX 5090 PSU page or try other pairs in the PSU calculator.

Upgrade paths

CPUs that remove the bottleneck

AM5

Ryzen 7 9800X3Dindex 100

Best CPU for the RTX 5090 Best GPU for the Ryzen 5 8600G RTX 5090 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.