news 28 Posted January 9, 2012 Reference clock speeds on the HD 7970 were set at 925 MHz on the GPU and 1375 MHz on the memory. Â For comparison, the XFX Black Edition ramps that up to 1000 MHz on the GPU and 1425 MHz on the GDDR5 memory. Â While these aren't out of this world results that we might have been hoping for, the 8% boost or so in clock rate will surely be seen. URL: http://www.pcper.com/reviews/Graphics-Cards/XFX-Radeon-HD-7970-3GB-Black-Edition-and-CrossFire-Results Quote: "Let's you and I be completely honest with each other, we can almost predict exactly what performance benefits you can get from a higher clocked GPU on games where the GPU is indeed the bottleneck. For the XFX Radeon HD 7970 Black Edition Double Dissipation and its 1000 MHz clock speed, performance falls in line with those expectations. Our benchmarks show that in all cases, including 1680x1050 resolution tests, the move from the 925 MHz reference clock to the settings XFX ships with results in 4-7% improvements. There are a couple of exceptions like Skyrim, where the nature of the title lends itself more towards software / architectural changes but in general this is the case." Thanks for a post!! Ryan Shrout PC Perspective rshrout ( -at -) pcper.com Share this post Link to post