I have a Gigabyte Windforce Radeon HD 7950 and when ever I play games for an extended amount of time I notice that once every 30 minutes or so the game with seem to freeze for a second or two and I can hear the fans on the GPU slow significantly for a couple of seconds then they will pick back up and the game will run smoothly again. I'm running the catalyst 12.11 driver and I was wondering if this was a driver problem, or a problem with my GPU, or something else?