Some nVidia cards in their nVidia control panel let you set if the graphics card can be used for graphics and compute activities or just graphics only.
Maybe track down if that setting exists on your graphics card, see what it is set to and toggle it to see if YMMV.
When you are clever, you can use graphics card to bypass the normal Intel/AMD CPU route for getting code to be processed to do stuff. This nVidia setting controls what the graphics card will do.