Ah, so you are talking about CUDA PhysX ? Well, it is different matter as GPU code is often mixed between version and uses components that reside outside the SDK (like APEX), and I don't think that GPU usage is a proper measurement for its effectivenes. However, from my personal gaming experience, if you compare similar effect in 2.8 and 3.x games, let's say Turbulence in Hawken and Warframe; Warframe, a PhysX 3 based game, runs much smoother. Are you waiting for a game that will allows you to run GPU PhysX effects with perfect performance without NV GPU at all or something ? Heh. As for PlanetSide 2, I asked one engineer, who was working on the integration, about the lack of CPU particle effects, and he replied that at the time it was a directive from SOE - to save as many CPU cycles as possible for other needs. CPU impact debris and other non-turbulence particles may be added in the future, but not right now.