User’s Manual
Table Of Contents
- 1.1 Knowing BIOS
- 1.2 BIOS setup program
- 1.3 My Favorites
- 1.4 Main menu
- 1.5 Ai Tweaker menu
- 1.6 Advanced menu
- 1.6.1 AMD fTPM configuration
- 1.6.2 CPU Configuration
- 1.6.3 SATA Configuration
- 1.6.4 Onboard Devices Configuration
- 1.6.5 APM Configuration
- 1.6.6 PCI Subsystem Settings
- 1.6.7 USB Configuration
- 1.6.8 Network Stack Configuration
- 1.6.9 HDD/SSD SMART Information
- 1.6.10 NVMe Configuration
- 1.6.11 AMD PBS
- 1.6.12 AMD Overclocking
- 1.6.13 AMD CBS
- 1.7 Monitor menu
- 1.8 Boot menu
- 1.9 Tool menu
- 1.10 Exit menu
- 1.11 Updating BIOS
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ROG STRIX B550-E GAMING BIOS Manual
1.6.6 PCI Subsystem Settings
The items in this menu allow you to set PCI, PCI-X, and PCI Express settings.
Above 4G Decoding
This option allows 64bit-capable devices to be decoded in Above 4G Space and is available
only when the system supports 64 bit PCI decoding. Conguration options: [Disabled]
[Enabled]
SR-IOV Support
This option enables or disables Single Root IO Virtualization Support if the system has SR-
IOV capable PCIe devices. Conguration options: [Disabled] [Enabled]
1.6.7 USB Conguration
The items in this menu allow you to set PCI, PCI-X, and PCI Express settings.
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.
XHCI Hand-off
[Enabled] Enables the support for operating systems without an XHCI hand-off
feature.
[Disabled] Disables the XHCI Hand-off support.