Sony VGN-SZ230P - Manual (Page 101)

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Customizing Your VAIO Computer
Selecting Performance Modes
Your computer is equipped with the performance selector switch (1) to select a performance mode for lower power
consumption or faster performance.
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Once you have changed the performance mode with the performance selector switch, you must restart your computer to place it into the selected mode.
A window appears to prompt you for computer restart.
❑ STAMINA mode
Uses the Intel Graphics Media Accelerator to conserve battery power.
❑ SPEED mode
Uses the NVIDIA video controller to provide faster performance.
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You can find the current performance mode by the lit indicator on either side of the performance selector switch.