Руководство Пользователя для ASUS X99-M WS/SE

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Chapter 3: BIOS Setup

The items in this menu allow you to change the USB-related features.

The 

Mass Storage Devices item shows the auto-detected values. If no USB device is 

detected, the item shows 

None.

[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.