Rev.A BIOS Setup 3-7

Developer's Guide SR-600
Confidential
POWER MANAGEMENT SETUP

It sets the items related to power management. Power management prolongs the battery life for

LCD backlight, HDD and other parts.

CPU Temp It sets the Low Limit of Thermal Throttling by hardware.
If the setting temperature is below the Low Limit, it automatically changes CPU to Full On from
Low Power Mode. If the temperature difference with Hot Limit is too littl e, CPU speed changes
frequently and the performance may decrea s e. A l so, it is necessary to set the lower
temperature than the High Limit.
Thermal Monitor Displays CPU Junction Temperature in Celsius or Fahrenheit.
Fan Speed
Monitor Displays revolutions of CPU fan and Power Supply Fan in RPM.
Voltage Monitor Displays the Voltage of VTT(1.5V series), VCORE(2.0V series), 3.3V, 5V and12V.

Table 3-5 POWER MANAGEMENT SETUP Menu

Items Description
PM Control by
APM It enables or disables to control the power management with the APM (Advanced Power
Management) BIOS from the OS or the applicat ion. Normally set at [Yes]. If the APM driver is
included in the operating system, power manage ment control and the automatic power off
functions can be enabled. If the APM driver is not included in the operating system, neither the
power management control nor the automatic power off functions can be enabled even if
[Yes] is set. If [No] is set, the power manageme nt co n trol with APM BIOS Function CAll does not
function at all.
Throttle Duty
Cycle It sets a CPU Clock Duty during CPU Low Power Mode, Video Off Mode, and CPU Control Mode
by Thermal. CPU speed is slower as setting valu e gets bigger.
Video Off
Method It sets the method for turning the video off with power management. Normally set at [V/H
SYNC+Blank].
V/H SYNC+Blank: Stops the vertical/horizontal sync signals and video signals from the video
controller. It is common for the display of monitors that support power management to also be
switched off when the vertical/horizontal sync signal i s stopped.
DPMS: Controls the BIOS in accordance with the video controller's DPMS function
(Display Power Management System.) It is necessary for DPMS to be supported by the moni tor.
Blank Only: Set when using monitors that only have a display off function and do not support
power management.
HDD Power
Down Timer
It sets the power down (stop the motor) timer for the HDD. The HDD enters the power down
mode when the system idles continuously for a pre-determined period
of time.The timer is reset if an access to the HDD head occurs within the set time. The default
setting is 15 minutes, and can be changed by in 1 minute increments. Also, it does not change
to the HDD power down mode from the Disabled setting.
Video Off Timer It is same as Stand-by mode of general PC. CPU is in Low Power operation or Video Sub System
Power Down during this mode. Therefore, systems other than CPU and Vide o Sub System is in
Full On Mode. If the system is kept idle continuously, it sets or moves the Video Sub System to
Off mode after several minutes.
Suspend Timer It sets the timer for shifting to the suspend mode. The system enters the suspend mode after
idling continuously for a pre-determined period of time. Suspend mode is no t supp orted with
Windows NT. Normally set at [Disabled].
Front Switch
Function It sets the function of the main power switch (front switch) during the power on status. When the
front power switch is pressed during the power off status, it always turns on the SR-600.
Power Off : Forced powe r off
APM Power Off : Tells the APM BIOS that an event occurs.Usually the application uses this
notice for some operation.
The default setting is APM Power OFF.

Table 3-4 CHIPSET FEATURES SETUP Menu

Items Description