Cpu Speed - Texas Instruments TravelMate 4000M User Reference Manual

Optimizing Battery Operation
Hard Disk Motor Timeout
The hard disk turns off automatically after no activity for
the time set for the Hard Disk Motor Timeout interval in the
Setup Program. You can change the default 5-minutes
setting using the Setup Program.
Note: When the hard disk is off, remember that a slight
delay occurs for the disk drive to reach operating speed.
Some word processing and file editing programs save your
work to a back-up file automatically, causing frequent
access to your hard disk. This could use more power than
leaving the hard disk always on. With such programs, set
the Hard Disk Motor Timeout to higher values. If you find
that the hard disk stays on too much even when you are
not accessing it, try a lower setting, such as 1 minute.

CPU Speed

You can set the
high (which also corresponds to power consumption), or
auto. The auto option sets
operate the computer on AC power or to low on battery
power. Use medium if you are using battery power on DX4
models. Set
your application to save battery power.
LCD Power
You can set the
(which also corresponds to power consumption), or auto.
However, the lower the
update performance. The auto option sets
high when you operate the computer on AC power or to
medium on battery power. Setting the battery power to low,
will give you better battery life and font screen updates.
On most models, set
values to save battery power. Some graphics programs do
5-8 Power-Saving Utilities
Speed item in Setup to low, medium,
CPU
CPU
Speed to the lowest value acceptable to
CPU
Power item to low, medium, high
LCD
power, the higher the
LCD
Power to the lowest acceptable
LCD
speed to high when you
power to
LCD
video
CPU