Chapter 4: UEFI BIOS
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• Untrusted: If this option is selected, the host (your system) will abort all requests on
CXL.$.
• Auto: This option is based on Si Compatibility.
CXL Header Bypass
Set this feature to enable or disable the CXL header bypass. The options are Disable
and Enable.
South Bridge
The following information is displayed:
• USB Module Version
• USB Devices:
Legacy USB Support
Select Enabled to support onboard legacy USB devices. Select Auto to disable legacy
support if there are no legacy USB devices present. Select Disabled to have all USB
devices available for EFI applications only. The options are Enabled, Disabled, and Auto.
XHCI Hand-o
This is a work-around solution for operating systems that do not support Extensible Host
the XHCI driver. The options are Enabled and Disabled.
Port 60/64 Emulation
Select Enabled for I/O port 60h/64h emulation support, which in turn, provides complete
legacy USB keyboard support for the operating systems that do not support legacy USB
devices. The options are Disabled and Enabled.
PCIe PLL SSC
Select Enabled for PCH PCIe Spread Spectrum Clocking (SSC) support, which allows the
BIOS to monitor and attempt to reduce the level of electromagnetic interference caused
by the components whenever needed. The options are Disabled, 0.3%, 0.5%, and Auto.
Server ME Information
The following information is displayed:
•
• Oper. Firmware Version
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