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Chapter 7: BIOS
tion and allow the onboard fans to constantly run at full speed. The Options are:
Disabled, 4-pin (Server), 4-pin (Workstation), 4-pin (Quiet), 4-pin (Super Quiet).
Voltage Readings
The following voltage readings will be displayed.
CPU0 Vcore, CPU1 Vcore, 1.5V, 5V, 5VSB, 12V, -12V, 3.3Vcc, 3.3VSB, VBAT
and Vtt
ACPI Confi guration
Use this feature to confi gure Advanced Confi guration and Power Interface (ACPI)
power management settings for your system.
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-
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.
USB Device Wakeup
Select Enable to "wake-up" the system via a USB device when the system is in
S3 or S4 State. The options are Enabled and Disabled.
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 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 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.
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