TAG MIL-BOOK 10 - Manual (Page 78)

Intel® SpeedStep™ Tech.
This item is only available if the CPU you are using supports the Intel®
SpeedStep™ function. You can only select one of them.
Automatic Allows maximum CPU performance when using
AC/car power but minimum CPU performance
when using battery power.
Maximum
Performance
Allows maximum CPU performance regardless of
power source.
Battery
Optimized
Allows minimum CPU performance regardless of
power source.
Disabled Intel® SpeedStep™ function is disabled.
Setup Configuration Utility (SCU) 5-21