I got 2 older video cards but the better 1 of the 2s fan burnd out. So i'm takeing the hsf of 1 to fix the other, the only problem is I cant get 1 of the hsfs off. its a realy old nvidia tnt2 64 mb card so i'm gessing that the heat sink has been there just freekin melding to it. so i'm asking how do I get this thing off?