Asus R2E - Manual (Page 29)

UltraMobilePC
2
Power Management Modes
The UltraMobilePC 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 UltraMobilePC 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. (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 con-
sumption 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 UltraMobilePC’s thermal state. These pow-
er control cannot be configured by the user and should be known in case the UltraMobilePC 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.