Unigine Tropics Benchmark 1.3 - Nvidia Surround - GTX 670 3-Way SLI:
http://www.youtube.com/watch?v=wYpFSWbL9V8
My triple-monitor gaming rig absolutely destroys this benchmark. Never mind that it's old, it's been updated to support DX11, and here are the results! How well does your rig stack up? :)