I've had my GTX480 for a couple of weeks and all seemed well until 10 minutes ago. I just jumped into Bad Company 2 for a game and noticed that my FPS wasn't what it should be and as I hadn't restarted the PC for about a week (I leave it on 24/7) I decided to restart the PC. I then opened GPU-Z to make sure the clock speeds were what they should be and it's then I noticed something. The "Bus Interface" seems to be changing on it's own. Compared to - Is it a glitch with GPU-Z or something more serious?!?