CoreTemp shows temperatures up to 70C, but PC wizard shows only 55C at full load. I'm not sure which one is the correct one.Maybe, its is your power supply because it looks like you need a little more juice than 430 w to run you system overclocked. But from restarts me and my friends have had during a stress test, power supply isn't usually the problem and we all mostly run 500w supplies. Why don't you try running a stress test and a temperature monitor at the same time and have the temp monitor save a log to see if your system overheated.