Unified drive for gtx580 and back. Right now I have GTX 570 I can't use for physics since Nvidia hasn't released unified driver with gtx 470 and gtx 580. So I have no dedicated physics card. I hope its soon.
Pfft, tell that to me with my GTX 595 dedicated PhysX Card along with my GTX 280 as my main card!!! Mafia 2 Baby!!
Why would you dedicate the 595 for Physx? I don't even think you can dedicate 2 gpus to PhysX. I asked a similar question about a 295 for PhysX and I was told that only one of the gpus would be used for it.