I certainly didn't expect these results. I thought we'd see a mild overclock out of the card, but with the lack of cooling on the back of the memory, I never expected to get what we got. Our final stable overclock turned out to be 551MHz on the core, and a whopping 658MHz on the memory. We're talking about more than a 30 percent increase in both core and memory speeds. If I had thought that the X600XT was a monster of an overclocking card, this is it's daddy.



Link: OC Cafe