ASUS Z97M-PLUS ユーザーズマニュアル

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Chapter 3: BIOS setup

[Auto] 

The xHCI is automatically enabled and runs at USB 3.0 mode when the 

xHCI driver is installed in the operating system.

[Smart Auto] 

Upon detection, the xHCI driver supports the USB 3.0 mode during both 

POST and operating system.

[Enabled] 

Enables the xHCI controller.

[Disabled] 

Disables the xHCI controller.

[Enabled] 

Enables the support for operating systems without an EHCI hand-off 

feature.

[Disabled] 

Disables the EHCI Hand-off support.

This item allows your system to detect the devices according to their media formats.
Configuration options: [Auto] [Floppy] [Forced FDD] [Hard Disk] [CD-ROM]

Allows you to enable or disable the individual USB port.

Refer to section 1.2.2 Motherboard layout for the location of the USB ports.

The items in this menu allow you to configure the platform-related features.

This item allows you to enhance the power saving feature of PCI Express and perform ASPM 

operations in the operating system. Configuration options: [Disabled] [Enabled]