GPU overclocking causes lower score in Heaven benchmark

[nj4ck]

Hey forum,

 

I just ran my R9 290 through the Unigine Heaven benchmark running at 1080/1350MHz. The score was 1905. After that, I gave it an extra +6mV in Afterburner and ran the benchmark again, this time at 1100/1350MHz. For some reason, my score didn't increase, but rather dropped to 1856. 

Afterburner shows the card running at stable 1100 MHz and not throttling at all, GPU temps in the low '80s and VRM temps exceeding 100°C as usual (It's an XFX Double Dissipation card).

 

Does anyone have any ideas as to what the cause of the performance drop could be?

[Tea1337]

Sometimes overclocking doesn't give out extra performance, or it could be a driver issue. 

[Bluuz]

1) There is always variance in the scores, that's why most people take the averages over multiple runs. Try running at 1080 again.

2) If you notice the fps continue to be consistently lower, it just means the higher clock is unstable and 1080 is what you should leave it running at.