Asus M2N-MX - Manual (Page 67)

ASUS M2N-MX 2-2
CPU Frequency [200]
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 230. Refer to the table below for the correct Front Side Bus and CPU
External Frequency settings.
PCI Express Frequency [Auto]
Allows you to select PCI Express frequency.
Configuration options: [Auto] [90] [91] [92] [93]... [150]
Spread Spectrum [Enabled]
Allows you to enable or disable the clock generator spread spectrum.
Configuration options: [Disabled] [Enabled]