Specifications

ASUS X99-PRO
3-39
Chapter 3
Intel VT for Directed I/O (VT-d)
The items in this menu allow you to congure the Intel
®
Virtualization Technology for Directed
I/O (VT-d).
Intel VT for Directed I/O (VT-d) [Disabled]
This item allows you to enable/disable the Intel Virtualization Technology for Directed
I/O (VT-d) by reporting the I/O device assigment to VMM through DMAR ACPI Tables.
Conguration options: [Enabled] [Disabled]
3.6.5 USB Configuration
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.
Intel xHCI Mode [Smart Auto]
[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.