Physics Working On HD 4890?

[saaya]

PhysX is running on the CPU in these situations, and as the article points out it's quite slow.

its probably running on one core only then... hope the guys at clunk can check cpu and cpu core usage with physix enabled and disabled, that should clear things up

oh and physix running slow on a cpu says more about the way its coded than the performance of the cpu is my guess

i read somewhere that nvidia was very active in opencl development and that opencl is actually very similar to cuda? and they ported physix to run onto their gpus using cuda, right? so is that true? is opencl and cuda very similar? and if yes, is it similar because nvidia supported opencl and donated a lot of code, or is it similar because of other reasons?