i used Prime95 and CoreTemp. CoreTemp when i was watching it was saying 42c to 61c. Prime95 seemed to be going well then about 30 mins running both, up popped a blue screen say something like memory dump hardware malfunction and something about bois fault. then went to a black screen and computer started to bleep one long bleep. now computer will not start. i put everything into the other motherboard and all was well , put back to broken one and nothing. so seems like it blow something on the motherboard. glad it wasn't the q6600. motherboard is only 2 weeks old, guess where i'm going in the morning.