Hi
Right click on your desktop, if you have an nVidia GT 630 installed then you should see NVidia Control Panel on the right click dropdown menu.
Also try opening Device Manager...
(Right Click on the Desktop, select Personalize, Control Panel Home, Select View by Large Icons in the upper right, select System, Device Manager) ...
and look at Display Adapters.
It will say what display adapter your computer is running.
Or you can go to, Programs, Administrative Tools, System Information and look at components, Display.
Come back here and let us know what it says.
Mike