When I play a movie I get 45-50°C 10-13 % GPU usage 38-41% fan speed 130-160mb memory usage. After 1 min if i don't press a button on keyboard or move the mouse I get 50-55°C 99% GPU usage 52-58% fan speed 1600mb memory usage. If I press a button or move the mouse everything is back to normal again but for exact 1 min. After 1 min the same problem. I've done dust clean 2 weeks ago and also formatted my computer but the problem don't go away. This do not occur if the is no full screen application. Also occur in games. I've used MSI Afterburner for the info. I have NVidia GeForce GTS 450. After the dust clean the problem was gone but for only two weeks. Any solution?