We made it run on a Foxconn C51 Nforce 590 SLI board and we used two Leadtek 7950 GX2 graphic cards. We tried this numerous times before but this was the winning combination.
You gain quite some performance and we will give you more details about the performance of the beast later. It is faster than Conroe and a single 7950 GX2, that's for sure. µ