Acnodes OPC 8190 - Manual (Page 41)

Disabled
Set this item to prevent the chipset power
management and APM (Advanced Power
Management) features.
Enabled
Set this item to allow the chipset power
management and APM (Advanced Power
Management) features. This is the default
setting.
 APM Configuration
You can use this screen to select options for the APM
Configuration, and change the value of the selected option. A
description of the selected item appears on the right side of the
screen.
 Power Management/APM
Set this item to allow Power Management/APM support. The
default setting is Enabled.
 Video Power Down Mode
This option specifies the Power State that the video
subsystem enters when the BIOS places it in a power saving
state after the specified period of display inactivity has
expired. The default setting is Suspend