XFX Radeon 6970 and 6950
A couple critical notes before we proceed: as always, mileage will vary when overclocking, so be vigilant in monitoring temperatures and be sure to always test for stability after each incremental change. We recommend FurMark or Kombustor for stability testing as they’ll drawing more power and cause higher temperatures than your favourite game or 3DMark benchmark, so it is a worst-case scenario. Otherwise, run 3DMark Vantage or OCCT and see if it can pass a few looped tests for stability, but be sure to log and monitor the resulting temperatures.
With that out of the way, we settled in for some overclocking of the core and memory clocks and achieved the following result for the 6950:
And the 6970:
These are great results, especially considering we actually maxed out the overclocking utility on the cards. No doubt we could have gone higher if we had the chance. We expect that as utility and third party software are updated for the 6900 series cards, those limits will be freed and there should be more left in the tank for overclocking.