PhysX's "CPU-only" codepath was intentionally built at a lower optimization level than their "with NVidia GPU" codepath for a while, leading to disproportionate

PhysX's "CPU-only" codepath was intentionally built at a lower optimization level than their "with NVidia GPU" codepath for a while, leading to disproportionately lower performance than simply the lack of GPU kernels would create: http://semiaccurate.com/2010/07/07/nvidia-purposefully-hobbles-physx-cpu/ http://semiaccurate.com/2010/07/07/nvidia-purposefully-hobbl...