Asus A88XM-PLUS - Manual (Page 56)

2-20 Chapter 2: BIOS information
IGFX Multi-Monitor [Disabled]
Enables or disables the Internal Graphics Device Multi-Monitor support for add-on VGA
devices. And the memory size of Internal Graphics Device will keep memory reserved.
Configuration options: [Disabled] [Enabled]
The IGFX Multi-Monitor item must be enabled before using AMD ® Dual Graphics
technology.
Primary Video Device [PCIE / PCI Video]
Selects the primary display device. Configuration options: [IGFX Video] [PCIE / PCI Video]
Integrated Graphics [Auto]
Enables the integrated graphics controller. Configuration options: [Auto] [Force]
UMA Frame Buffer Size [Auto]
Configuration options: [Auto] [32M] [64M] [128M] [256M] [512M] [1G] [2G]
2.6.4 NB Configuration