Sony VGN-Z690N - Manual (Page 107)

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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.
!
Be sure to close all open applications before changing a performance mode. If not, you may lose any unsaved data.
During the switching process, your computer screen becomes dark and may temporarily show some noise or flicker. This is normal and does not
indicate a malfunction.
To cancel the switching process, set the performance selector switch back to its original position.
❑ STAMINA mode
Uses the Intel Graphics Media Accelerator and disables some hardware devices on your computer to conserve battery
power.
❑ SPEED mode
Uses the NVIDIA video controller to provide faster performance.
!
The HDMI output port on your computer and the DVI-D port on the docking station are functional only when the computer is in SPEED mode.
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You can find the current performance mode by the indicator lights on either side of the performance selector switch.