A first look at Nvidia's GPU physics
 

If you'd told me a year ago that my PC would have hardware PhysX support today, I'd have been a little dubious. Last summer, running hardware game physics simulations involved shelling out $150-200 for a PhysX card, and all you got for your investment was limited support in a handful of titles. Not exactly a stocking-stuffer.

That will all change next week. On August 12, Nvidia will release new graphics drivers that will allow owners of most GeForce 8, GeForce 9, and GeForce GTX 200-series cards to use PhysX acceleration without spending a dime. Along with the drivers will come a downloadable PhysX software pack containing free Unreal Tournament 3 maps, the full version of NetDevil's Warmonger, a couple of Nvidia demos, and sneak peeks at Object Software's Metal Knight Zero and Nurien Software's Nurien social-networking service. Nvidia provided us with early access to the pack, and we've been testing it over the past couple of days.

http://techreport.com/articles.x/15261