Asus Maximus IV Extreme-Z - Manual (Page 98)

3-6 Chapter 3: BIOS setup
Scroll down to display the following items:
Load Extreme OC Profile
Press <Enter> and select Yes to load the extreme OC profile to suit extreme
overclocking.
Ai Overclock Tuner [Auto]
Allows you to select the CPU overclocking options to achieve the desired CPU
internal frequency. Select any of these preset overclocking configuration options:
[Auto]
Loads the optimal settings for the system.
[Manual] Allows you to individually set overclocking parameters.
BCLK/PEG Frequency [XXX]
Allows you to adjust the CPU and VGA frequency to enhance the system
performance. This item only appears when you set Ai Overclock Tuner to
[Manual]. Use the <+> and <-> keys to adjust the value. You can also key in the
desired value using the numeric keypad. The values range from 80.0MHz to
300.0MHz.
Turbo Ratio [Auto]
Allows you to manually adjust the Turbo CPU ratio.
[Auto]
All Turbo ratio are set by Intel CPU default settings
[All Cores mode (Adjustabale in OS)]
All numbers of active cores will be set to one single Turbo ratio in OS
[By number of active cores mode (Unadjustable in OS)]
All numbers of active cores can be set to an individual Turbo ratio in BIOS.