Asus P9X79 - Manual (Page 74)

3-8 Chapter 3: BIOS setup
Chapter 3
Scroll down to display the following items:
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.
[X.M.P.] If you install memory modules supporting the eXtreme Memory Profile
(X.M.P.) Technology, choose this item to set the profiles supported by your
memory modules for optimizing the system performance.
The following three items appear only when you set the Ai Overclocking Tuner item to
[Manual].
BCLK Frequency [XXX]
Allows you to adjust the CPU and VGA frequency to enhance the system performance.
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.
CPU Strap [Auto]
Configuration options: [Auto] [100MHz] [125MHz] [166MHz] [250MHz]
ClockGen Full Reset [Enabled]
[Enabled] Enabled for better overclocking.
[Disabled] To skip system shutdown at BCLK frequency adjustment.