I have been freezing in game with only a reset button way out. I loaded NVIDIA nTUNE and appear to have high GPU temp.s, removed the card, cleaned it, and thought I would also use RIVA Tuner to speed up my fan. Here is what I have found so far. My 8800GTX is idling high 50's C, and runs well into the 80's C in game (I play COD4...a lot). My fan speed is running at 675 rpm, by NVIDIA monitor. I down loaded Rivatuner 2.07, and searched for a tutorial.....several are out there, or in this forum. My problem, is when I go to driver settings, customize, video card, fan tab...... my defaults all say 112% ?? I sure don't understand this. What gives, and what do I do ? How does 675rpm GPU fan speed, compare to other GTX owners ?