I know that in most cases that a cpu works or it doesn't. My computer has been crashing and getting bsod's under heavy load. I earlier suspected that my ram was going bad and tested the 2 sticks in memtest in single channel and had several errors within the first minute or two. I tested each stick in A1 and B1 with no errors after 5 passes. Then went back to the "faulty" configuration and no errors and was left scratching my head. Then maybe it could be my PSU, but all voltages were within acceptable range. However, Prime95 freezes my computer after a few seconds of the Small FFT torture test (maximum FPU stress, data fits in L2 cache, RAM not tested). This is leading me to believe that my cpu's memory controller is going bad. I'm almost at my wit's end.