Can I use my 8600GT for Physx

It doesnt eat much power maybe 60watts, was wondering could I pair it up with an ATI card or does it have to be a Nvidia card.

You can pair it up with either although nVidia in there wisdom that if you pair a GeForce with a Radeon the Physx are locked out in the new drivers. You canget past this with a patch driver (Check Google) the guy who makes it keeps it up to date.