GPU Clock Frequency Analysis

In order to better understand how the R9 Nano manages its clocks, I ran a test of three games from our benchmark suite, at four resolutions each.

If you take a look at the graphs, it quickly becomes apparent that AMD's "up to 1000 MHz" is not wrong as 1000 MHz is actually achieved, though I would classify it as misleading. In reality, the frequencies depend a lot on the actual game played, and the resolution.

The "best" example is GTA V at 1600x900 resolution—here, we see an average of 992 MHz with the card running 1000 MHz quite often. On the other hand, The Witcher 3 at 4k resolution will only run an average of 868 MHz, which is roughly a 15% clock difference.

Overall gaming performance is good though, so I would classify these results as working as intended.