My mate is ahving a problem with his graphcis card, tis 2 years old, and he has jsut installed S.T.A.L.K.E.R and he kept getting overheating msgs. He opened up his case and after inspecting the fan, he realised instead of it sucking in air into the card, thus blowing air over the heatsink, its just blowing air into the case, so little air travels over the heatsink.what can be the problem of this and how is it fixed.