User's Manual

5.1.4 SpeedStep
Your notebook is equipped SpeedStep technology to better
manage power consumption. It changes the processor
speed to find the best balance between your computing
performance and power consumption needs. Higher
speeds enjoy better performance, while slower speeds
conserve more power.
In Windows XP, the processor's performance level
depends on the Power Scheme you select (see Power
Options Properties). You do not need to make any further
adjustments to set the performance level. Each preset
power scheme has different time-out settings for entering
standby mode, hibernate mode, turning off the display, and
turning off the hard drive.
For example, the Portable/Laptop mode automatically
changes SpeedStep modes depending on if you are
running the computer on AC power or batteries in order to
prolong battery usage while still providing optimal
performance.