Asus I220GC User Manual page 58

The following item appears only when you set the AI Overclocking item to
[Manual].
CPU Frequency [XXX]
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 133 to 400. Refer to the table below for
the correct Front Side Bus and CPU External Frequency settings.
FSB/CPU External Frequency Synchronization
Front Side Bus
FSB 1066
FSB 800
FSB 667
DRAM Frequency [Auto]
Allows you to set the DDR2 operating frequency.
Configuration options: [Auto] [DDR2-400MHz] [DDR2-533MHz]
Selecting a very high DRAM frequency may cause the system to become
unstable! If this happens, revert to the default setting.
PCI Express Frequency [Auto]
Allows you to select PCI express frequency. Configuration options: [Auto] [90] [91]
[92] [93] [94] [95] [96] [97] [98] [99] [100] [101] [102] [103] [104]
The following item appears only when you set the AI Overclocking item to
[Overclock Profile].
Overclock Options [Overclock 5%]
Allows you to set the overclock profile.
Configuration options: [Overclock 5%] [Overclock 10%] [Overclock 15%]
[Overclock 20%] [Overclock 30%]
2-20
CPU External Frequency
266 MHz
200 MHz
133 MHz
Chapter 2: BIOS setup