Despite having the correct motherboard and 3x 8800GTXes, I can't even run SLI. At all. Even with the latest drivers.

If I downgrade to Vista, I could do triple SLI. But not on 2 monitors.

But all told, I could 5 box with 2560 x 1600. Would SLI work like that, 5 windows rather than one full screen? Not sure.