well, so good so far, seem to be fixed with a mannual instead of auto OC... did some research and I think the biggest difference was I set the PLL voltage to 1.8125 instead of just leaving it on auto, apparently on auto it drops below 1.8 on high OCs
otherwise, could just be some instability with the auto OC. some have also suggested AMD driver issues with the 79xx series
anyway, to reiterate, so good so far with even a 6hr idle run, no bsod's. so I'm a happy camper
thanks guys and hope this helps others with similar issues!