ATI and Physx

Not really, but I wouldn't worry too much about it. PhysX acceleration on the GPU only makes a difference on a few games.

thanks! that's what I heard!

From what I read, PhysX would work fine on any modern quad core, but Nvidia went out of their way to "un-optimise" it for multi-threading/etc. I guess it's in their best interest to make anything other than their video cards seem slow.