here's the thread on my 2 pc 3 screen setup Link to original thread i initially tried to run all three screens off one machine with a 8800 Ulyra XT and GTX 260 but the FPS was really poor on the second card, so I bought a second machine.

I'm still getting 50-60 FPS through Northrend and no problems with swapping lead character, as each instance of wow is large enough to be useful. (1050x840 on the slaves)