Sony Viao PictureBook Computer Handbuch

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Troubleshooting Your Computer
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The sound of my computer’s fan is too loud.
Use the PowerPanel™ utility to change the Thermal Control Strategy setting to 
Quiet. This setting slows down the CPU speed. See PowerPanel Help for more 
information.
Why does the System Properties dialog box display a slower 
CPU speed than advertised?
This is normal. Because your computer’s CPU utilizes a type of CPU speed 
controlling technology, System Properties may display the CPU’s current speed 
instead of the maximum advertised speed.