Under Advance BIOS Features:
Onboard VGA
Enables or disables the onboard graphics function. Auto
Allows you to set up a dual-display configuration in Windows 7 operating system. (Default) Enable If No Ext PEG
Activates the onboard graphics only when no PCI Express graphics card is installed. Always Enable
Always activates the onboard graphics, whether or not a PCI Express graphics card is installed. If you wish to set up a dual-display configuration, set this item to Always Enable.
You just needed to take it slower and look at all the menus.