I recently went through this problem, and just wanted to say that the Swifttech MCX159-CU heatsink / fan combo will fit when using 2 graphics cards. Im using 2 EVGA 6800GTs, with the stock cooling on them. So anyone with similar set up looking for a chipset fan, I'd go with this. NICE copper sink and fan. It will run you about 30 bucks, from their website. But good set up.