Asus M2N-X - Manual (Page 62)

2-20 Chapter 2: BIOS setup
The following item appears only when the AI Overclocking item is set to
[MANUAL].
CPU Frequency (MHz) [200.0]
Displays the frequency sent by the clock generator to the system bus and
PCI bus. The value of this item is auto-detected by the BIOS. Use the <+>
and <-> keys to adjust the CPU frequency. You can also type the desired
CPU frequency using the numeric keypad. The values range from 200 to
300.
PCI-Express Frequency (MHz) [100]
Allows you to select PCI-Express frequency.
Configuration options: [100] [101] [102] [103]... [150]
Overclock Options [Auto]
Allows you to select the overclock options.
Configuration options: [Auto] [Overclock 3%] [Overclock 5%]
[Overclock 7%]
The following item appears only when the AI Overclocking item is set to
[Overclock Profile].
Selecting a very high CPU frequency may cause the system to become
unstable! If this happens, revert to the default setting.