My video card runs really hot. It idles at just about 60 degrees, and when I run graphically intensive game, like Call of Duty 4, it gets up to 85-87 degrees. How can I improve cooling in my computer? The card is an XFX GeForce 8600 XXX 256 mb. It has a plastic cover over the heatsink and a small fan. It sucks air in and blows it out the sides of the plastic cover. I have cleaned the fan but I haven't cleaned the heatsink because I don't know how to get that cover off.