Asus F2A55-M LK2 PLUS - Manual (Page 59)

Chapter 2: BIOS information 2-19
2.5.3 USB Configuration
The items in this menu allow you to change the USB-related features.
The USB Devices item shows the auto-detected values. If no USB device is detected, the
item shows None.
USB Device Enable [Enabled]
[Enabled] Enables available USB devices.
[Disabled] Disables available USB devices.
Legacy USB Support [Enabled]
[Enabled] Enables the support for USB devices on legacy operating systems (OS).
[Disabled] The USB devices can be used only for the BIOS setup program.
[Auto] Allows the system to detect the presence of USB devices at startup. If
detected, the USB controller legacy mode is enabled. If no USB device is
detected, the legacy USB support is disabled.
EHCI Hand-off [Disabled]
[Enabled] Enables the support for operating systems without an EHCI hand-off
feature.
[Disabled] Disables the function.
USB Single Port Control
Allows you to enable/disable individual USB ports.
2.5.4 NB Configuration
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]
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]
This item appears only when you set the previous item to [Force]. Configuration options:
[Auto] [32M] [64M] [128M] - [2G]