What is PhysX card?

PhysX is an open-source realtime physics engine middleware SDK developed by Nvidia as a part of Nvidia GameWorks software suite. However, after Ageia's acquisition by Nvidia, dedicated PhysX cards have been discontinued in favor of the API being run on CUDA-enabled GeForce GPUs.

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Moreover, is a physx card worth it?

Personally, I've found it to be well worth it, as some really great games use it, and to spectacular effect. Furthermore, PhysX often appears in very high-end games that use plenty of other advanced features, in which case you want to give your PC all the help it can get. Should I dedicate my GPU to PhysX? You can just dedicate a GPU to process only physics in the graphics card options if you have multiple cards. Considering that most newer Nvidia/AMD GPUs are compatible with Physx, you don't really need one. You'd be better off getting a second graphics card. The CPU does a great job of acting at the physx device.

You can also ask is physx dead?

PhysX is very much alive and currently the most popular physics middleware alongside Havok. It's baked into Unity and Unreal Engine 4 and a great number of other games also use it. Initially, video games supporting PhysX were meant to be accelerated by PhysX PPU (expansion cards designed by Ageia). One may also ask what should i set physx to? PhysX: GPU or CP. If you're unsure, you can always stick to the auto setting but it is generally a good idea to set it to use the GPU instead of the CPU. You should do this regardless of how fast/new your CPU is.

Is PhysX free to use?

The NVIDIA PhysX SDK (binary) is 100% free and available right now for download by developers. In addition to the free software offering, NVIDIA offers a support plan and a paid license program which enables developers to modify the SDK to suit their needs.