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Chapter 2: Getting started
2.6.5 USB Conguration
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.
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. It cannot
be recognized in boot devices list.
[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.
Intel xHCI Mode [Smart Auto]
[Auto] Keeps the last operation of xHCI controller in OS during bootup.
[Smart Auto] Enables the operation of xHCI controller.
[Enabled] Enables the xHCI controller.
[Disabled] Disables the xHCI controller.
EHCI Hand-off [Disabled]
[Enabled] Enables the support for operating systems without an EHCI hand-off
feature.
[Disabled] Disables the EHCI Hand-off support.
USB Single Port Control
Allows you to enable or disable the individual USB port.
Refer to section 1.2.3 Motherboard layout for the location of the USB ports.
2.6.6 Platform Misc Conguration
The items in this menu allow you to congure the platform-related features.
PCI Express Native Power Management [Disabled]
Allows you to enhance the power saving feature of PCI Express and perform ASPM
operations in the operating system. Conguration options: [Disabled] [Enabled]
The following item appears only when you set the PCI Express Native Power
Management to [Enabled].
Native ASPM [Disabled]
[Enabled] Vista controls the ASPM support for the device.
[Disabled] BIOS controls the ASPM support for the device.