Although NVIDIA bought AGEIA Technologies only two months ago (on February 13, 2008), the GeForce creator informed recently that the conversion of AGEIA's PhysX API engine to CUDA programming language that interfaces with the GPUs is almost complete. Upong completeion of CUDA, owners of GeForce 8 and 9 series graphics cards will be able to play PhysX-enabled games without the need of an additional AGEIA PhysX PCI card. The big question here is, how much will this PhysX addition worse the frame rate in games. Well for now we only know that NVIDIA showed off a particle demo at its recent analysts day that was apparently similar to Intel’s Nehalem physics demo from IDF 2008. For the record, the Nehalem demo managed 50,000 - 60,000 particles at 15-20 fps (without a GPU), while NVIDIA’s demo on a GeForce 9800 card achieved the same level of particles at an amazing 300 fps, quite a boost. NVIDIA's next-gen parts (G100: GT100/200) in theory can double this score to top 600 fps. Manju Hegde, co-founder and former CEO of AGEIA added that in-game physics will be the "second biggest thing" in 2008.
Source: TG Daily