LOL Well, I managed to play Oblivion ok without realising I'd got my AGP port running at PCI speeds on my X1600, just knocked it up to work at a proper 8x AGP speed, and the boost is incredible

Yeah, physics chips are more decoration at the moment, give them a few generations, once theres a unfied 'physics' language, like DirectX, and I think those things could be great, Graphics card handles the drawing, Physics card throws all the junk around and all the CPU has to do it support AI and hold everything together. That's probably better than having a single chip running at incredible speeds and filling half the case with cooling equipment.