Power Management Setup Menu 4-23
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Power Management Setup Menu
This APM (Advanced Power Management) determines how much power can be saved by
setting the items below to handle the system power resource. The following descriptions specify
the definition of each item in detail.
ACPI Standby State
This option supports ACPI standby state S1(POS) and S3(STR) and is not supported by Legacy
backplanes.
S1 Sleeping State
Places the processor into the STPCLK grant state.Throttles the processor’s input clock to run
the duty cycle (See
Throttle Slow Clock Ratio
), placing the processor into the stop clock state.
The system clocks (PCI and CPU) continue to run during the sleeping state. Any wakeup event
should cause the hardware to de-assert the STPCLK# signal to the processor.
S3 Sleeping State
All devices on the computer are turned off except for the system RAM.
Power Management/APM
Advanced Power Management (APM) controls the system’s power resources. Set this option to
Enabled
to enable the power management function. It will operate based on parameter settings.
This option is not supported by Legacy backplanes.
Video Power Down Mode
This option activates the power-conserving state that the VESA VGA video subsystem enters
after the specified period of display inactivity.