Same here, I unplugged my Sata DVD drive and it crashed 3 times in about an hour. I noticed that even though my CPU temp is nice and low, the heat pipe rig on the chipsets seems to be getting pretty hot. I transplanted everything into an Antec 900 case and shut off the heater vent in the room. For one whole day I got no reboots, then the next day I got several. I'm waiting for the new Ram to arrive.