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Power Management Modes; Sleep And Hibernate; Thermal Power Control - Asus E3108 Hardware User Manual

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3
Getting Started

Power Management Modes

The Notebook PC has a number of automatic or adjustable power saving features that you can use to
maximize battery life and lower Total Cost of Ownership (TCO). You can control some of these features
through the Power menu in the BIOS Setup. ACPI power management settings are made through the
operating system. The power management features are designed to save as much electricity as possible
by putting components into a low power consumption mode as often as possible but also allow full
operation on demand.

Sleep and Hibernate

Power management settings can be found in the Windows > Control Panel
> Power Options. In System Settings, you can define "Sleep/Hibernate"
or "Shut Down" for closing the display panel or pressing the power button.
"Sleep" and "Hibernate" saves power when your Notebook PC is not in
use by turning OFF certain components. When you resume your work,
your last status (such as a document scrolled down half way or email typed
half way) will reappear as if you never left. "Shut Down" will close all
applications and ask if you want to save your work if any are not saved.
Sleep is the same as Suspend-to-RAM (STR). This function stores your
current data and status in RAM while many components are turned OFF.
Because RAM is volatile, it requires power to keep (refresh) the data.
Click the Start button and the arrowhead next to the lock icon to see this
option. You can also use the keyboard shortcut [Fn F1] to activate this
mode. Recover by pressing any keyboard key except [Fn]. (NOTE: The
power indicator will blink in this mode.)
Hibernate is the same as Suspend-to-Disk (STD) and stores your current data and status on the hard
disk drive. By doing this, RAM does not have to be periodically refreshed and power consumption is
greatly reduced but not completely eliminated because certain wake-up components like LAN needs to
remain powered. "Hibernate" saves more power compared to "Sleep". Click the Start button and the
arrowhead next to the lock icon to see this option. Recover by pressing the power button. (NOTE: The
power indicator will be OFF in this mode.)

Thermal Power Control

There are three power control methods for controlling the Notebook PC's thermal state. These power
control cannot be configured by the user and should be known in case the Notebook PC should enter
these states. The following temperatures represent the chassis temperature (not CPU).
The fan turns ON for active cooling when the temperature reaches the safe upper limit.
The CPU decreases speed for passive cooling when the temperature exceeds the safe upper limit.
The system shut down for critical cooling when temperature exceeds the maximum safe upper
limit.
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