Acer Aspire 7735ZG - Manual (Page 30)

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Power management
This computer has a built-in power management unit that monitors system
activity. System activity refers to any activity involving one or more of the
following devices: keyboard, mouse, hard disk, peripherals connected to the
computer, and video memory. If no activity is detected for a period of time
(called an inactivity timeout), the computer stops some or all of these devices in
order to conserve energy.
This computer employs a power management scheme that supports the
advanced configuration and power interface (ACPI), which allows for maximum
power conservation and maximum performance at the same time. Windows
handles all power-saving chores for your computer.
Acer PowerSmart key
The Acer PowerSmart key uses the power-saving features of your computer’s
graphics sub-system to reduce overall power consumption. When you press the
Acer PowerSmart key, the Windows graphics scheme will be changed to
Windows Vista Basic, screen brightness reduced and the graphics chip will be
switched to a lower speed.
Press the Acer PowerSmart key again to return to your previous settings.