I just installed Windows with my CPU running at 2.63Ghz. So far, it seems stable. Have not primed it yet but I'll be getting to it soon. Superpi finished in 30mins and 1sec, though. I'm continuing my theories here from this thread: http://forums.rojakpot.com/showthread.php?t=20186 I originally thought that my video corruption was caused by ATi's video drivers as it would only surface after installing them and OCing the CPU. But now I'm beginning to think differently. I set my HTT freq. to 239x11 with both CPU and RAM voltages at default. Have not crashed yet so far and no signs of previous video corruption either. It now seems as though the voltages were the culprit for the corruption. I still haven't installed Cat drivers. I'm not too sure about it yet. What you guys think?