How old is the system? I wonder if age might have anything to do with it? If you really want to do some testing rather than waiting then you could try setting the overclock again and then running something like Prime95 to stress test the system. This will let you know if it's stable or not. I'd run the test for about an hour, monitoring temps as you go. GIMPS - Free Prime95 software downloads - PrimeNet Temp monitoring HWiNFO, HWiNFO32/64 - Download Oh and post any new dump files please.