The USB Devices item shows the auto-detected values. If no USB device is detected, the item shows None.

Legacy USB Support [Enabled]

[Disabled]

The USB devices can be used only for the BIOS setup program.

[Enabled]

Enables the support for USB devices on legacy operating systems (OS).

[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]

[Disabled]

Disables the function.

[Enabled]

Enables the support for USB 3.0 devices on legacy operating systems

 

(OS).

EHCI Hand-off [Disabled]

[Disabled]

Disables the function.

[Enabled]

Enables the support for operating systems without an EHCI handoff

 

feature.

SB USB Configuration

3 Chapter

All USB Devices [Enabled]

Allows you to enable or disable all USB devices.

Configuration options: [Disabled][Enabled]

EHCI Controller 1 [Enabled]

Allows you to enable or disable EHCI Controller 1.

Configuration options: [Disabled][Enabled]

EHCI Controller 2 [Enabled]

Allows you to enable or disable EHCI Controller 2.

Configuration options: [Disabled][Enabled]

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Chapter 3: BIOS setup