i have the geforce 8800gt card and after a while of keeping the pc on the fan on the video card sped up alot and i was wondering if that was due to too much heat in the case? i have 3 fans and the cpu is watercooled. i shutdown my pc after that happened b/c i was going to sleep. the next day i turned it on and again it was the same thing. the fan to the video card was spinning fast. its the loudest thing in my case now. when i first built the pc which was a few days before this happened, the video card was quiet. why now is the fan working overtime even after it was cooled for a night and then started up again.