Chapter 4: AMI BIOS
4-19
tion and allow the onboard fans to constantly run at full speed. The Options are:
Full Speed, Server, Workstation/Desktop, and Super Quiet.
Voltage Readings
The following voltage readings will be displayed.
CPU1 Vcore, CPU2 Vcore, CPU1 Vtt, CPU2 Vtt, CPU1 DIMM, CPU2 DIMM, 1.1V,
1.5V, 1.8V, 3.3V, 12V, 5V, 3.3 Vsb, and VBAT
ACPI Confi guration
Use this feature to confi gure Advanced Confi guration and Power Interface (ACPI)
power management settings for your system.
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.
ACPI Version Features
The options are ACPI v1.0, ACPI v2.0 and ACPI v3.0. Please refer to ACPI's website
for further explanation: http://www.acpi.info/.
PS2 KB/MS Wake Up
Select Enable to "wake-up" the system using either the PS2 keyboard or mouse (if
equipped) when the system is in S3 (Sleep) or S4 (Hibernate) state. The options
are Enabled and Disabled.
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.
Headless Mode
This feature is used to enable system to function without a keyboard, monitor and/
or mouse attached The options are Enabled and Disabled.
High Performance 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-
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