Power
Using SpeedStep
(Windows 2000 Professional Only)
In Windows 2000 Professional the Intel Pentium IV Processor with SpeedStep technology enables you to set the processor speed for optimal performance or optimal power conservation. The SpeedStep technology can also enable an automatic change in CPU (central processing unit) speed when the power source changes between AC power and battery power or when notebook use changes between active and idle.
These changes in CPU speed function independently from the power management settings available through the operating system. For information about using Windows power management features, refer to “Setting Power Management Preferences” earlier in this section.
✎In Windows XP Home and Windows XP Professional, the functions of SpeedStep technology are managed through the operating system.
Choosing a Performance Mode
The SpeedStep technology offers 4 preset performance modes:
■In Maximum Performance mode, the processor runs at full speed to provide maximum performance.
■In Automatic mode, the processor speed increases while the notebook is being used and decreases when the notebook is not being used.
■In Battery Optimized mode, the processor runs at a reduced speed to provide an optimal balance between energy conservation and performance.
■In Maximum Battery mode, the processor runs at a greatly reduced speed to provide maximum energy conservation.
The notebook can run in any of the performance modes while it is operating on AC power or on battery power.
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