Nvidia PhysX Opens up a little

capawesome9870 · March 5, 2015

This is from the perspective of an AMD Radeon User.

I personally do not like PhysX, Mainly because PhysX doesn't do that well on the CPU.

Personally have the AMD FX8350 and playing a few PhysX enabled games on my AMD HD7870. I seen little to no MULTI-TRHEAD increases in CPU usage, were Physics Calculations are inherently multi-threaded.

I hope that the following, from Epic's Unreal Engine Blog, will help get PhysX to work better on the CPU side and with multi-thread, as i see Nvidia keeping PhysX "helping" blocked if AMD GPUs are present.

And today we’re excited to announce an expansion of that partnership with NVIDIA providing all UE4 developers with not just binary but C++ source access to the CPU-based implementation of PhysX 3.3.3, including the clothing and destruction libraries, through Epic’s Unreal Engine repository on GitHub. This means that the entire UE4 community can now view and modify this PhysX code alongside the complete C++ source code for UE4. Modifications can be shared with NVIDIA who will review and incorporate accepted submissions into their main PhysX branch, which then flows into future versions of UE4.

Source: https://www.unrealengine.com/blog/nvidia-opens-physx-code-to-ue4-developers