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X8DAH+/X8DAH+-F/X8DAH+(-F)-LR User's Manual
ACPI Configuration
Use this feature to configure Advanced Configuration and Power Interface (ACPI)
power management settings for your system.
High Precision Event Timer
Select Enabled to activate the High Performance 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 de-
pendency on other timestamp calculation devices, such as an x86 RDTSC Instruc-
tion embedded in the CPU. The High Performance Event Timer is used to replace
the 8254 Programmable Interval Timer. The options are
Enabled
and Disabled.
ACPI Aware O/S
Enable ACPI support if it is supported by the OS to control ACPI through the Operat-
ing System. Otherwise, disable this feature. The options are
Yes
and No.
Suspend Mode
This option is used to select the ACPI State that is used for system suspend. The
options are
S1 (POS)
, S3 (STR) and Auto.
S1 (POS) - The caches in a processor are erased, and the processor stops ex-
ecuting instructions. Power to the processor and RAM is maintained, and RAM
is refreshed.
S3 (STR) - The processor has no power, and the power supply goes on reduced
power mode. However, main memory (RAM) is still active.
ACPI APIC Support
Select Enabled to include the ACPI APIC Table Pointer in the RSDT (Root System
Description Table) pointer list. The options are
Enabled
and Disabled.
APIC ACPI SCI IRQ
When this item is set to Enabled, APIC ACPI SCI IRQ is supported by the system.
The options are Enabled and
Disabled
.
PCIE Native Support
Select Enabled to enable native support for PCIE. The options are Enabled and
Disabled
.
Headless Mode
Select Enabled for the system to function normally without the presence of a key-
board, monitor and or mouse attached The options are Enabled and
Disabled
.
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