IBM ThinkPad T30 Series Service And Troubleshooting Manual page 38

Solving computer problems
v Automatic: Switches the processor speed between high and low, depending
on how much the processor is used. If the use increases, Intel SpeedStep
switches the processor speed to high.
v Battery Optimized Performance: Keeps the processor speed low at all
times.
To choose a mode, do the following:
1. Start the ThinkPad Configuration Program.
2. Click Power Management.
3. Click the Intel SpeedStep technology tab.
4. From the list, select the mode you want.
5. Click OK.
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ThinkPad T30 Series Service and Troubleshooting Guide