© National Instruments
|
2-15
Select
Full Speed
to allow the onboard fans to run at full speed (100 percent Pulse Width
Modulation Duty Cycle) for maximum cooling. The
Full Speed
setting is recommended for
special system configuration or debugging.
Select
Performance
for the onboard fans to run at 70 percent of the Initial PWM Cycle for better
system cooling. The
Performance
setting is recommended for high-power-consuming and
high-density systems.
Select
Balanced
for the onboard fans to run at 50 percent of the Initial PWM Cycle to balance
the needs between system cooling and power saving. The
Balanced
setting is recommended for
regular systems with normal hardware configurations.
Select
Energy Saving
for the onboard fans to run at 30 percent of the Initial PWM Cycle for
best power efficiency and maximum quietness.
The options are
Full Speed (@100% of PWM Cycle)
,
Performance (@70% of PWM Cycle)
,
Balanced (@50% of PWM Cycle)
, and
Energy Saving (@30% of PWM Cycle)
.
Fan1 ~ Fan 6 Reading
This option displays the fan speed readings from fan interfaces Fan1 through Fan5. The options
are
Vcore
,
AVCC
,
3.3Vcc
,
12V
,
V_DIMM
,
5V
,
–12V
,
3.3Vsb
, and
Vbat
.
ACPI Configuration
Use this menu to configure Advanced Configuration 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. This provides smooth playback and reduces the dependency on other
timestamp calculation devices such as an
x
86 RDTSC Instruction embedded in the CPU. The
High-Performance Event Timer replaces the 8254 Programmable Interval Timer. The options
are
Enabled
and
Disabled
.
ACPI Aware O/S
This option enables ACPI support (if the OS supports it) to control ACPI through the OS.
Otherwise, disable this feature. The options are
Yes
(enabled) and
No
(disabled).
ACPI APIC Support
Select
Enabled
to include the ACPI APIC Table Pointer in the Root System Description Table
(RSDT) pointer list. The options are
Enabled
and
Disabled
.
APIC ACPI SCI IRQ
When you set this item to
Enabled
, the system supports APIC ACPI SCI IRQ. The options are
Enabled
and
Disabled
.
