Chapter 3
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3-5 Power Management Setup
This section provides information on the Green PC power management functions.
By choosing the Power Management Setup option from the CMOS Setup Utility
menu (Figure 3-1), the screen below is displayed. This sample screen contains the
manufacturer's default values for the motherboard
Figure 3-5 Power Management Setup
ACPI Suspend Type:
This feature allows user to select a suspend type for the operating system to turn off
peripherals devices, such as CD-ROM players, when they are not in use.
Power Management:
Power management allows the computer to save electricity when it is not in use by
entering increasingly deep power saving modes.
Video Off Method:
This function serves as both a screen saver and power saver for monitors. See the
next function, Video Off After, for setting the video timer.
1.
Blank
- BIOS will only blank the monitor's screen. The electricity saved in this
mode is negligible and this function is only used as a screen saver to prevent
screen damage while the screen is on but not in use.
2.
V/H SYNC+Blank
- The system turns off the vertical and horizontal
synchronization ports, writes blanks to the VGA buffer and the monitor's
electron gun turns off. This function requires a monitor with Green features in
order to take advantage of the power saving function. If you enable this function
and do not have a Green monitor, the result will be the same as if you had
Chapter 4
40
selected Blank. This function serves as both a screen saver and a power saver.
3.
DPMS Supported
- Select this option if your video card supports the Display
Power Management Signaling (DPMS) standard (i.e., you have a monitor that
supports Green features). Use software supplied by your video subsystem to set
video power management options.
Video off in Suspend:
This setting determines when the monitor enters power setting mode. If set to Yes,
the monitor enters the power saving mode after the chosen event expires. The Power
Management function must be enabled to use this function.
Modem Use IRQ:
If your computer has an modem use this function to tell BIOS which IRQ is being
occupied by the modem card. When the system is in Green mode, the modem
requires an IRQ assignment to wake up the system and perform tasks. This
assignment is complaint with the APM 1.2 complaint operating systems.
Suspend Mode:
The Power Management finction must not be set to disabled to enable this function.
If the system runs in Standby mode and the Suspend timer expires, all devices
regulated by power management will shut off and the CPU speed will be 0 MHz.
HDD Power Down:
Shuts down any IDE hard disk drives in the system after a period of inactivity as set
in this user configurable field. This feature does not affect SCSI hard drives.
Soft-Off by PBTN:
When set to Delay 4 Sec., this function allows the power button to put the system in
Suspend, a power saving mode. When set to Instant-Off the Soft-Off by PWR-BTN
function is disabled and the computer turns completely off when the power button is
pressed.
Wake up Events
1.
Power On PCI Card:
When enabled, a PCI interface that receives a signal will wake up the system from
soft off and green mode.
2.
Power On by Modem:
When enabled, a Modem will be able to receive a signal and wake up the system
from soft off and green mode. You should connect the modem to the COM port and
call your PC to power on.
