MSI Megabook M645 Getting Started page 84

M645
BIOS Setup
Intel (R) SpeedStep (tm) tech.
This item allows you to enable or disable Intel SpeedStep technology.
When set to Disabled, the system always operates in a conserve power
mode (the processor works at FSB400-600MHz or FSB533-800MHz). If
you want optimize the processor, set this item to Enabled, so that the
processor's speed will be controlled by the use of your operating system
and applications.
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