Generally in BIOS the setting to determine which GPU should be the Main Display adapter is set to "Auto".
Which means that as soon as you install a GPU Card, BIOS will automatically make the GPU card your Main Display Adapter and not your 5600G Integrated Graphics.
Look in Device Manager and both the GPU card and Integrated Graphics should be enabled without any errors.
But the GPU card will be your main GPU for your PC and not your Integrated Graphics from your APU.
