|XFX R7970 Black Edition Radeon Video Card|
|Reviews - Featured Reviews: Video Cards|
|Written by David Ramsey|
|Sunday, 08 January 2012|
Page 16 of 18
XFX R7970 DD Overclocking
The XFX R7970 Black Edition Double Dissipation video card comes pre-overclocked. While the stock Radeon 7970 runs its GPU at 925MHz and its memory at 1375MHz, out of the box the XFX card is running at 1GHz and 1425MHz, respectively. But maybe there's more to be had. Third party overclocking tools haven't been updated for the Southern Islands GPUs yet, so I was limited to AMD's own Overdrive utility, built into the Catalyst Control Center.
My overclocking consisted of simply slamming the sliders as far to the right as they would go. This gave me a GPU clock of 1125MHz and a memory clock of 1575MHz. I set the card to be able to use the full 20% extra power allowed. I verified the settings using GPU-Z:
The card was completely stable at these settings, and the fans didn't seem any louder except under FurMark testing. Here's how the overclock helped performance:
Given the card's stability and relatively low temperatures with this overclock, I'm sure further performance increases will be possible when the various third party overclocking tools are updated to work with these cards.