I've OC my i7 920 to 4.12GHz and it has passed LinX with 20 passes and 7.5 hours of Prime95, but whenever I play games, my PC will freeze after 20-30 minutes. I tried upping the voltage with no luck. Is there a reason I can pass stability tests but not play games past a certain point?? Too bad I can't go above 4GHz (stable while gaming and stress tests)