Asus ROG MAXIMUS Z790 DARK HERO ROG Z790 Series BIOS Manual English - Page 80
USB Configuration, Re-Size BAR Support, SR-IOV Support, Legacy USB Support
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The following item appears only when Above 4G Decoding is set to [Enabled]. Re-Size BAR Support If the system has Resizable BAR capable PCIe Devices, this option enables or disables Resizable BAR Support (Only if System supports 64 bit PCI Decoding). Configuration options: [Disabled] [Enabled] To enable Re-Size BAR Support for harnessing full GPU memory, please go to the Boot section and set CSM(Compatibility Support Module) to [Disabled]. SR-IOV Support This option enables or disables Single Root IO Virtualization Support if the system has SRIOV capable PCIe devices. Configuration options: [Disabled] [Enabled] 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] Your system supports the USB devices in legacy operating systems. [Disabled] Your USB devices can be used for BIOS setup only and cannot be recognized in the boot devices list. [Auto] Your system automatically detects the presence of USB devices at startup. If any USB devices are detected, the legacy USB support is enabled. 80 ROG Z790 Series (Intel® 14th) BIOS Manual