I have (I think) a second generation Mac Pro. It's a 2.66 Quad Xenon with 5GB Ram and a Radeon X1900. I just got a Time Capsule, set it up, and backups seem to be going well. The weird thing is, randomly my Video card fan will ramp up to full speed, while the computer is asleep, and will stay there until I click the mouse and wake up the computer. Does this have something to do with Time Machine? Has anyone else experienced this?