I've had this system for a few months. I had it running at 3.3 with the FSB set at 220 with no problems. It ran Prime95 for about 10 hours with no errors. I've since reformatted, changed the video card, and swapped a Thermaltake 480W PSU for an Ultra 500W PSU. Now Prime95 fails after a matter of minutes. I've tried upping the CPU core voltage by .1 over the default, but the result is the same. Anyone have any ideas?