Supermicro X12STD-F User Manual page 74

Super X12STD-F User's Manual
ACPI Settings

WHEA Support
This feature enables the Windows Hardware Error Architecture (WHEA) support for the
Windows 2008 (or later version) operating system. The options are Disabled and Enabled.
High Precision Event Timer
Select Enabled to activate the High Precision Event Timer (HPET) that 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, such as an x86 RDTSC Instruction embedded in the CPU.
The High Performance Event Timer is used to replace the 8254 Programmable Interval Timer.
The options are Disabled and Enabled.
Native PCIE Enable
Enable this feature to grant control of PCI Express Native hot plug, PCI Express Power
Management Events, and PCI Express Capability Structure Control. The options are Disabled
and Enabled.
Native ASPM
Select Enabled for the operating system to control the ASPM or Disabled for the BIOS to
control the ASPM. The options are Auto, Enabled, and Disabled.
USB Configuration

USB Configuration
USB Module Version:
USB Controllers:
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 Disable to have all USB devices available
for EFI applications only. The options are Enabled, Disabled, and Auto.
XHCI Hand-off
This is a work-around 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 settings are Enabled and Disabled.
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