Well, I take this back. I'm going to have the gf turn the PC off until I get back from this damn project here in NY (I'm pretty sure the girlfriend is tired of listening to troubleshooting instructions over the phone). I'm almost 100% positive it's PSU related now. Edit: Anyone here know if it'll hurt a vid card if it has power to the 6-pin adapter while the system is off??? I'm contemplating an experiment for Fri.