I ran Prime95 on my system (see sig) overclocked to: 200x11.5 (vCore=1.675v), with memory at 200MHz also, and at timings of 6-3-2-2T.
It resulted with:
"FATAL ERROR: Final result was DC10DD91, expected: B0680C2B.
Hardware failure detected, consult stress.txt file.
Torture test ran 4 hours...