i bought a phenom x4 920 and a different heatsink in june. i overclocked it to 3.4ghz (fsb in my bios) and never kept it any higher cause i couldnt up the voltage and keep low enough temps. about a week ago my computer began randomly restarting itself anywhere between 5min to 5 hours of being on. i turned of the overclock and it still happens. i put in my old processor and ran prime95 for 15 min with no problems and then diid the same with the 920 and still had no problems but an hour and a half later it rebooted its self. the temps on my processor have never been above 62 which is the "recomended" highest temp on the amd site. how can i make this stop?