Chapter 4: AMI BIOS
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System Temperature
System temperature will be displayed as detected by the BIOS.
Peripheral Temperature
Peripheral temperature will be displayed as detected by the BIOS.
Fan Speed
This feature displays the fan speed readings for all fans detected by the BIOS.
Voltage Readings
The following voltage readings will be displayed.
VTT, 1.1V, 1.5V, 5VSB, 5V, 12V, CPU1 Vcore, CPU2 Vcore, VDIMM AB, VDIMM
CD, VDIMM EF, VDIMM GH, 3.3V, 3.3VSB, and VBAT.
ACPI Setting
Use this feature to congure Advanced Conguration and Power Interface (ACPI)
power management settings for your system.
ACPI Sleep State
Use this feature to select the ACPI State when the system is in sleep mode. Select
S1 (CPU_Stop_Clock) to erase all CPU caches and stop executing instructions.
Power to the CPU(s) and RAM is maintained, but RAM is refreshed. Select Suspend
Disabled to use power-reduced mode. Power will only be supplied to limited com-
ponents (such as RAMs) to maintain the most critical functions of the system. The
options are S1 (CPU_Stop_Clock), Suspend Disabled, and S3 (Suspend to RAM).
Numa
This feature enables the Non-Uniform Memory Access ACPI support. The options
are Enabled and Disabled.
High Precision 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, 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.
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