PhysX on a CPU likely to see very little benefit from SSE recompile

[Final8ty]

I really think you're confusing APIs with the use of those APIs. There's nothing inherent about Havok that makes it "not overly saturated". You can easily code Havok routines that bog down your CPU.

Indeed, but its funny that its nearly impossible for developers to write Physx routines that don't bog down the GPU.