I bough a card in the mail the other day, got it in the mail today, installed it and got the appropriate drivers. I started gaming, and two minutes in I started hearing a REALLY loud clicking noise. I looked in my computer and it sounded like it was coming from my 6870s fan. I checked in the card and I can't see anything stuck in it, and the sound only comes when the fan speeds are really high. Graphically, the performance is beautiful. Nothing is wrong with it besides the sound. Any suggestions?