To help laptops conserve battery life, by default the integrated graphics chipset is selected on laptops that also have dedicated graphics cards. Laptop users need to manually override the graphics default in the AMD or Nvidia control panels as outlined above.
In the last few months, one of the Win10 updates reset graphics preferences. One can quickly check which graphic option is being used from inside SU. Go to the Window menu > Preferences > OpenGL and click on the Details button.