Just some extra information, hope it helps
You may want to keep both enabled, the internal graphical processor in your processor and the external processor on your new card, because some applications benefit by using both, like NLE's and games, one for the picture on your screen and one for tasks like rendering.
If it is an NVidia card you can do that by opening the NVidia control panel, select the tab 3D-control, and select in the 3D-control window
'Programs'