ok i have the weirdest problem. when im not on the computer my 2 sli 580s heat up to 87c and than fans go up while not on the computer and as soon as i move the mouse temps goes all the way down to their original hate, which in my case is 37c on both cards. I recently cleaned both my card's heat sinks as they were both clogged with dirt and also added thermal paste were the gpu chip is. I really don't know whats going on?