Gigabyte RX 7800 XT Gaming OC Review

1. Introduction2. Meet the Gigabyte RX 7800 XT Gaming OC3. Testing Methodology4. Game Benchmarks5. Clock Speed6. GPU Temperatures7. Acoustics8. Noise-Normalised Temperatures9. Power Draw and Efficiency10. Overclocking11. Closing Thoughts12. View All Pages

For our manual overclocking tests, we used AMD's built-in tuning tool. Our best results are as below.

Overclocking the RX 7800 XT mainly hinges on how far you can undervolt the GPU, and then how much extra frequency can be added to the GDDR6 memory. In this case, the Gaming OC was stable at 960mV, while we increased the memory speed to 2640MHz (21.12 Gbps effective.)

This overclock saw the real-world clock speed jump up by 330MHz or so, hitting 2841MHz over our thirty minute stress test, and this overclock was 100% stable in my testing.

That extra GPU and memory frequency netted us gains of between 9-10% in the titles we re-tested. It's not quite as big a jump forward as we saw from the PowerColor Hellhound, but you have to remember the Gaming OC had a larger factory overclock to begin with.

Unsurprisingly, power draw has risen by a fair chunk here, hitting 340W. That's a 16% increase in power draw.

Considering power draw increased by 16% but performance rose by 10%, we do see worsened efficiency when running this overclock – performance per Watt falls by 7% compared to the stock settings, while it's 18% less efficient than a stock-clocked reference 7800 XT.

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