i have OC'd my sapphire 7850 to the max CCC will allow, which is 1050/1450. it only gets about 3c warmer during BF3 gameplay than stock speeds (60c vs. 63c). so i decided to do manual control of the fan and bumped it to 60%. it was loud, but i played BF3 for 10 minutes and the hottest the video card got was 54c. that's 10 degrees difference!! so i'm wondering if cooler is better, or if at 60% the fans will die faster...and/or, which is more important? 10c is a dramatic difference.