3ghz quad core machine, 8gb ram, ati x1900 video card. When playing for longer periods at high resolution setting the video starts to get corrupted. This is temp related. If I escape to the menu (no 3d graphics) for 10 seconds it will go away (for awhile). I downloaded the SMC fan control program and if I crank up the system fans it generally won't occur. However it doesn't appear to me that the video card fan is actually speeding up very much during play. When I boot up it runs REALLY fast (very loud!) then slows down, so I know it has more RPMS that it could go. I opened up the case and made sure the fins were not clogged with dust (they aren't). Questions: 1) is there a way to directly control video card fan speed? 2) Can I monitor or measure it to see if it's ramping up as it should? 3) Any other suggestions?