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Quick Answer
The Ryzen 5 5600G will bottleneck the RTX 4060 by 12-20% at 1080p. The 5600G has half the L3 cache (16MB vs 32MB) of the regular 5600, which significantly impacts gaming performance. The 5600 is a much better choice for dedicated GPU builds.
The Ryzen 5 5600G was designed as an APU for systems without a dedicated GPU. While it can pair with a discrete GPU, its reduced cache causes noticeable performance loss compared to the Ryzen 5 5600.
The 5600G has only 16MB of L3 cache compared to 32MB on the 5600. This is because part of the die is dedicated to the integrated Vega graphics. In gaming with a dedicated GPU, that missing cache matters:
If you bought the 5600G to start without a GPU and now have an RTX 4060, upgrading to a Ryzen 5 5600 or 5600X is one of the most impactful upgrades you can make. Same AM4 socket, same motherboard, but 15-20% more gaming performance for under $150 AUD.
The cache penalty is smaller at 1440p (8-12% gap) because the GPU becomes more of the limiter. But the 5600 is still the clearly better choice.
Our Verdict
The 5600G works with the RTX 4060 but wastes 15-20% of the GPU's potential. Upgrade to a Ryzen 5 5600 for a massive performance boost. It is one of the cheapest and most impactful upgrades you can make on AM4.