Compaq Armada M300 Series Reference Manual page 54

Enable all settings in the main
SpeedStep window.
Remove the SpeedStep icon from
the taskbar.
The SpeedStep icon displays on the taskbar by default and
changes to indicate whether the computer is running in Maximum
Performance or Battery Optimized mode. The icon can also be
used for the following tasks:
Display current performance
mode.
Open the SpeedStep window.
Change the current performance
mode.
Continued
Select the Advanced button, then:
1. Clear the checkbox for Disable
Intel SpeedStep Technology
Control.
2. Select OK in the Advanced
window.
3. Select OK or Apply in the main
SpeedStep window..
Under some circumstances, it
may be necessary to restart the
computer after completing this
procedure.
Select the Advanced button, then:
1. Select the checkbox for
Remove Icon from Taskbar.
2. Select OK in the Advanced
window.
3. Select OK or Apply in the main
SpeedStep window.
Rest the pointer over the icon.
Double-click the icon.
Right-click the icon, then select a
performance mode with the up or
down arrow key.