Asus P8H77-M - Manual (Page 84)

Chapter 2: BIOS information 2-20
iGPU Multi-Monitor [Enabled]
Allows you to enable the iGPU Multi-Monitor. For Lucid Virtu MVP function support, set this item to
[Enabled] to empower both integrated and discrete graphics. iGPU shared system memory size is
fixed in 64MB. Configuration options: [Disabled] [Enabled]
NB PCIe Configuration
Allows you to configure the NB PCI Express settings.
PCIEX16_1 Link Speed [Auto]
Allows you to configure the PCIE x16_1 speed. Configuration options: [Auto] [Gen1] [Gen2]
The USB Devices item shows the auto-detected values. If no USB device is detected, the
item shows None.
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.
Legacy USB3.0 Support [Enabled]
[Enabled] Enables the support for USB 3.0 devices on legacy operating systems
(OS).
[Disabled] Disables the function.
Intel xHCI Mode [Smart Auto]
Allows you to select an operation mode for the Intel xHCI controller. Configuration options:
[Smart Auto] [Auto] [Enabled] [Disabled]
EHCI Hand-off [Disabled]
[Enabled] Enables the support for operating systems without an EHCI hand-off
feature.
[Disabled] Disables the function.
2.5.6 Onboard Devices Configuration
HD Audio Controller [Enabled]
[Enabled] Enables the High Definition Audio Controller.
[Disabled] Disables the controller.
The following two items appear only when you set the HD Audio Controller item to
[Enabled].
2.5.5 USB Configuration
The items in this menu allow you to change the USB-related features.