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X8STi/X8STi-F/X8STi-3F/X8STi-LN4 User’s Manual
CPU on-die temperature increases, the fan speed will also increase for effective
system cooling. Select Full Speed to allow the onboard fans to run at full speed (of
100% Pulse Width Modulation Duty Cycle) for maximum cooling. The Full Speed
setting is recommended for special system conguration or debugging. Select
Performance for the onboard fans to run at 70% of the Initial PWM Cycle for better
system cooling. The Performance setting is recommended for high-power-consum-
ing and high-density systems. Select Balanced for the onboard fans to run at 50%
of the Initial PWM Cycle in order to balance the needs between system cooling
and power saving. The Balanced setting is recommended for regular systems with
normal hardware congurations. Select Energy Saving for the onboard fans to run
at 30% of the Initial PWM Cycle for best power efciency and maximum quietness.
The Options are: Full Speed/FS (@100% of PWM Cycle), Performance/PF (@70%
of PWM Cycle), Balanced/BL (@50% of PWM Cycle), and Energy Saving/ES
(@30% of PWM Cycle).
Voltage Reading
This feature displays the current voltage detected of the various components in
the system:
Vcore, VDIMM, 5V, 12V, -12V, 3.3Vcc, 3.3VSB, VBAT, Vtt
ACPIConguration
Use this feature to congure Advanced Conguration 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.
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.
AMI OEMB Table
This enables the OEMB table support. The options are Enabled and Disabled.