Remember those modders from NGOHQ who were swolling out ATI's Radeon graphics cards with Nvidia's PhysX physics engine? Surprise, Nvidia loves the idea of their physics engine running on rival ATI's graphics cards, so they're giving Eran Badit and his crew total support, with access to documentation, SDKs, hardware and actual engineers. AMD, on the other hand, isn't being so cooperative.
Right now, Badit is chasing the goal of porting PhysX to the Radeon HD 4800, but ATI's not giving them any hardware yet, much less developer and PR support. Not totally surprising that ATI would stall, since porting their rival's physics engine to their cards is a definite poke at them and the Havok engine they licence from Intel.
And making PhysX more universal by having it run on ATI cards makes it more likely to be supported by game developers, which isn't so hot for Havok. Nvidia's definitely got the upper deck here, since in the meantime ATI looks like a bunch of meanies, but helping out Badit threatens their own wares. [TGDaily]