How many passes do you think are intended to give a reliable stability? yesterday i've used 10 passes, wich took me less than 8 min. of running with cores near to 80°C and got no errors, but then i run prim95 and system freezed after 2 hrs. do i have to give it a longer run, like 15-20 or more passes? it is safe to keep the cpu at those temps for so long time?