Lenovo IdeaCentre K4 series User Manual page 25

Notes:
• When you are running system-intensive games or other programs that
consume a high proportion of the system resources, you should choose
Turbo mode. This will allow you to achieve optimal performance.
• After unplugging and reconnecting the power cord to the outlet, the
computer cannot boot up at ultra speed in Turbo mode. In order to
keep ultra speed during the boot up, the computer must always keep
connecting the outlet.
• Toggle the Power Control Switch to the Auto or Boot position when
using OneKey Recovery program.
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User Guide