Hi I am trying to sdetup my new Sli setup, I have a Asus P6T Deluxe Motherboard, and 2 XFX Black Edition graphics cards, and and I am running Windows Vista 32 with SP2. Both cards are shown in the Device Manager, but the Nvidia Control Panel has no option to enable Sli. If I disable one of the graphics cards in the Device Manager, and then reboot the computer, and then re-enable the disabled graphics card, then the Sli option is available in the Nvidia Control Panel. The problem with Sli enbled is then when I reboot the computer crashes, with a blue screen IRQL_NOT_LESS_OR_EQUAL. I have tried the follwoing drivers: 182.50, 182.42, 186.18, 190.38, 190.56. Each driver give the same problem. I use a driver cleaner each time before installing the new drivers I have also installed the lassted motherboard BIOS, and also the latest Intel chipset drivers. Nothing helps, any ideas, please!!