When running memtest86 the pc reboots withing 3-4 secs when selcting option 1 or 3 option 2 just seems to freeze the system. This happens with both overclocked and stock settings. Also running Prime when overclocked results in an error on one of the cores. I'm not on overclocker and this was a pre-overclocked bundle. i5 @ 4ghz with 4gig of corsair ram. Also a corsair 750 watt psu. Temps when testing prime were 64-72 on all cores. Is it right for memtest to keep rebooting as I've never used it before?