No gpu-based physics, it's all cpu. But as i've said before, you can run games like mafia 2 with physX enabled WITHOUT an nvidia card, and decent (athlon II X4 630 is the cheapest at £63) cpu's still push along quite happily despite Nvidia throttling the maximum cpu usage to 40%. Crytek would have to be either be really inefficient with the coding (which they're not in CE3) or have waaaay too much physics going on that isn't noticable

In the end, all the physics in crysis 1 ran on a single, fairly slow, core!
Well, that was good to hear in a post. My old Athlon x4 was capable of far more than it seemed.
