Interesting. In the past, when I have OC'ed chips past their comfort threshold, I would get some kind of fatal exception windows protection faults and stuff like that and sometimes windows would lock up. In this situation, with the FSB @ 120, I go to the deskstop @ default voltage no problem. But when I would benchmark 3dmark, periodicaly, I would get bounced back to the desktop without error until I increased the voltage from 1.700v to 1.725v. @ that point, I only bounced back to desktop @ the very end. @ 1.750v, Rock stable, no bouncing back, no nothin'...