Will the Ryzen 5 8600G bottleneck the RX 7900 XTX?

Yes, at 1440p the Ryzen 5 8600G is estimated to limit the RX 7900 XTX by about 20%. The effect is larger at 1080p and smaller at 4K.

What power supply do I need for a Ryzen 5 8600G and RX 7900 XTX?

Estimated system load is about 520 W. A quality 750 W unit leaves roughly 30% headroom for transient spikes.

Is this pair better at 1080p or 4K?

1080p: CPU-limited 26% (moderate CPU bottleneck). 1440p: CPU-limited 20% (mild CPU bottleneck). 4K: GPU-limited 2% (balanced).

PCPairs

Ryzen 5 8600G + RX 7900 XTX: bottleneck check

20%

CPU-limited at 1440p. Mild CPU bottleneck.

CPU GPU

The Ryzen 5 8600G cannot feed the RX 7900 XTX fast enough at 1440p, so the card sits partly idle in CPU-heavy games.

By resolution

Resolution	Limiting part	Severity	Verdict
1080p	CPU	26%	moderate CPU bottleneck
1440p	CPU	20%	mild CPU bottleneck
4K	GPU	2%	balanced

This is the classic pattern: at 1080p the Ryzen 5 8600G is the limit (26%), while at 4K the RX 7900 XTX takes over (2% GPU-limited). If you play at 1080p on a high-refresh monitor, a faster CPU is the upgrade that matters; at 1440p or 4K this pair is already well matched.

Specifications

AMD Ryzen 5 8600G
Cores / threads	6 / 12
Max boost	5.0 GHz
Socket	AM5
Max turbo power	65 W
Released	2024
Gaming index	64 / 100
Multi-core index	54 / 100

AMD Radeon RX 7900 XTX
VRAM	24 GB
Board power	355 W
Released	2022
1080p index	70.2 / 100
1440p index	66 / 100
4K index	62.0 / 100

Power supply

CPU 65 W + GPU 355 W + about 100 W for motherboard, memory, storage and fans gives an estimated peak load of 520 W. We recommend a 750 W unit (80 Plus Gold or better) so transient spikes from the graphics card stay inside the PSU's comfort zone. Try other pairs in the PSU calculator.

Upgrade paths

CPUs that remove the bottleneck

AM5

Best CPU for the RX 7900 XTX Best GPU for the Ryzen 5 8600G RX 7900 XTX 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.