Asus P5B - Manual (Page 119)

ASUS P5B 5-9
5.3.5 ASUS AI Nap
This feature allows you to minimize the power consumption of your computer
whenever you are away. Enable this feature for minimum power consumption and
a more quiet system operation.
After installing AI Suite from the bundled support CD, you can launch the AI Nap
utility by clicking the AI Nap icon on the AI Suite main windows. Click Yes on the
confirmation screen.
To exit AI Nap mode, press the system power or mouse button then click Yes on
the confirmation screen.