Longhorn

nah, old physX was bad and purposefully anti competitive. NVIDIA...let's say "strategically neglected" ageia's ancient codebase which used a ton of x87 floating point. If you know anything about x87...instructions are notoriously slow / scalar on x86 CPUs. They *could* have ported PhysX to SSE (and eventually AVX)...but that would mean it would run great on an ordinary x86 Intel/AMD cpu. By doing the "ooops, we left it on x87" they created a pipeline that would *only* look good on NVIDIA GPUs, and nothing else. Zero good reason to use x87 floating point for physics calculations in games. 80 bits of precision is ridiculous.