Overclocking
Overclocking the Radeon RX 7900 XTX works differently than before, you must increase the power limit, and you must lower the maximum voltage, or there won't be a significant performance improvement-
- To start, you have to raise the power limit to maximum, the slider ends at +15%
- Next, give the maximum GPU clock slider a small boost, to ensure it doesn't end up being the limiting factor, I picked 3350 MHz
- Now gradually lower the maximum voltage, until your card becomes unstable in games, which happened for me at 0.99 V
- Increase the memory clock slider until the card becomes unstable in games. I noticed that with higher voltage you can run higher memory, but overall it will result in lower performance, because GPU clocks end up not so high
Testing notes & interpretation- Unless specifically noted in the text above, overclocking results listed in this section are achieved with the default settings for fan, power, voltage, etc. We choose this approach as it is the most realistic scenario for most users, while still maximizing the potential performance of the card.
- Each GPU, including each GPU of the same make and model, will overclock slightly differently based on random production variances.
- The data in this table shows comparable overclocks using identical conditions from previous TechPowerUp reviews.
- The Average GPU clock frequency reported in the table is an actual measurement of the clock speeds during 3DMark Time Spy Extreme GT1. Making a "maximum overclock" comparison just based on the "rated" clocks in GPU-Z will be inaccurate—actual frequencies is what matters.
Using these clock frequencies, we ran a quick test of 3DMark Time Spy GT1 to evaluate the gains from overclocking.