My ASUS P6T7 WS Supercomputer is here...

[JackOfAll]

My question, has anyone successfully used four separate Nvidia GFX cards (quad-SLI) on the P6T7 or is it even possible to run quad-SLI on four separate GFX cards? The drivers work with four GPU’s (2X295’s).

You're limited to 2 or 3-way SLI with single GPU cards. Quad SLI == 2x GTX295. A friend is running a pair of GTX295's in a P6T7 and gaming with quad SLI.

I run 4x GTX295 cards in a P6T7 folding rig, but this is not an SLI config, a max of 2x GTX295's are supported for quad SLI. A couple of pics of this setup are in this other thread, EK-FC295 GTX Single PCB - Released!.