Here's a comparison of running PhysX w/a CPU, the PPU, and the GPU.
http://techgage.com/article/nvidias_physx_performance_and_status_report/
From the benchmarks in the article, it doesn't look like those PhysX cards that some of us purchased are obsolete. In fact the cards help in the processing of the graphics, helping to take the load off of the CPU and GPU's. In the Unreal Tournament III Performance, the PPU helped add another 10 FPS.
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http://techgage.com/article/nvidias_physx_performance_and_status_report/
From the benchmarks in the article, it doesn't look like those PhysX cards that some of us purchased are obsolete. In fact the cards help in the processing of the graphics, helping to take the load off of the CPU and GPU's. In the Unreal Tournament III Performance, the PPU helped add another 10 FPS.
.