HP Compaq Series Hardware And Software Manual page 52

Power
Different states may be used, depending on whether the notebook
is running on external or battery power. After a power scheme has
been set, no other intervention is required to control the
performance of your notebook processor. The following table
describes the processor performance on external and battery
power for the available power schemes.
Power Scheme
Home/Office Desk
Portable/Laptop
Presentation
Always On
Minimal Power
Management
Max Battery
2–18
Processor
Performance While on
External Power
Always runs at the highest
performance state.
Performance state is
determined based on CPU
demand.
Performance state is
determined based on CPU
demand.
Always runs at the highest
performance state.
Performance state is
determined based on CPU
demand.
Performance state is
determined based on CPU
demand.
Processor
Performance While on
Battery Power
Performance state is
determined based on CPU
demand.
Performance state is
determined based on CPU
demand.
CPU performance is lower
on battery power, then
steadily decreases as the
battery discharges.
Always runs at the highest
performance state.
Performance state is
determined based on CPU
demand.
Starts at lowest
performance state, and
then uses linear
performance reduction
(stop-clock throttling) as the
battery discharges.
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