Supermicro B4SC1-CPU User Manual page 71

• ME Firmware Status #2
• Current State
• Error Code
ACPI Settings

High Precision Event Timer
Select Enabled to activate the High Precision Event Timer (HPET). The HPET produces
periodic interrupts at a much higher frequency than a Real-time Clock (RTC) does in
synchronizing multimedia streams, providing smooth playback, and reducing the dependency
on other timestamp calculation devices. The HPET replaces the 8254 Programmable Interval
Timer. The options are Disabled and Enabled.
Native PCIe Enable
Enable this feature to grant control of PCIe Native hot plug, PCIe Power Management Events,
and PCIe Capability Structure Control. The options are Disabled and Enabled.
Native ASPM
Use this feature to set whether ASPM should be controlled by the OS or by the BIOS. The
options are Auto, Enabled, and Disabled.
USB Configuration
USB Configuration
The following information will be displayed:
• USB Module Version
• USB Controllers
• USB Devices
Legacy USB Support
Use this feature to enable or disable Legacy USB support. When this feature is set to Auto,
legacy support is disabled if no USB devices are connected. When this feature is set to
Disabled, USB devices will be availably only for EFI applications. The options are Enabled,
Disabled, and Auto.
XHCI Hand-off
This feature is a workaround solution for operating systems that do not support Extensible
Host Controller Interface (XHCI) hand-off. The XHCI ownership change should be claimed
by the XHCI driver. The options are Enabled and Disabled.
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Chapter 4: UEFI BIOS