Asus ExpertCenter E500 G9 E500 G9 English User Manual - Page 126
USB Configuration, Legacy USB Support, XHCI Hand-off, Re-Size BAR Support, SR-IOV Support
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The following item appears only when Above 4G Decoding is set to [Enabled]. Re-Size BAR Support If system has Resizable BAR capable PCIe Devices, this option enables or disables Resizable BAR Support. Configuration options: [Disabled] [Enabled] SR-IOV Support Allows you to enable or disable Single Root IO Virtualization Support if the system has SRIOV capable PCIe devices. Configuration options: [Disabled] [Enabled] 4.6.12 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. Legacy USB Support [Enabled] Enabled the Legacy USB support. [Disabled] USB devices are available only for EFI applications. [Auto] Automatically disabled the Legacy USB support if no USB devices are connected. XHCI Hand-off This is a workaround for OSes without XHCI hand-off support. The XHCI ownership change should be claimed by XHCI driver. [Disabled] Support XHCI by XHCI drivers for operating systems with XHCI support. [Enabled] Support XHCI by BIOS for operating systems without XHCI support. 4-56 Chapter 4: BIOS Setup