Physx is not supported, because when installing the N card driver, Physx driver is not selected for installation. When reinstalling the driver, you can use it after checking the Physx driver.
DirectCompute is an API interface for general computing, which is partially integrated in DirectX from DX 10, while GTX650 supports DX 1 1, so it supports DirectCompute. It is not supported because XP system only supports DX9 at most, so it does not support DirectCompute.
There are two technologies:
Physx is a patented technology of NVIDIA, which can use the graphics card as a physical accelerator card.
Directcompute is an application program interface for GPU general computing, which was developed and popularized by Microsoft and integrated in Microsoft DirectX. DirectX 10 integrates Directcompute 4.0；; Directcompute 4. 1 is integrated in DirectX 10. 1; DirectX 1 1 integrates Directcompute 5.0.
These two technologies are basically not used by ordinary users, but only by specific user groups.