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 100

to 450. Refer to the table below for the correct Front Side Bus and CPU External Frequency settings.

FSB/CPU External Frequency Synchronization

Front Side Bus

CPU External Frequency

 

 

FSB 1066

266 MHz

FSB 800

200 MHz

FSB 533

133 MHz

DRAM Frequency [ Auto]

Allows you to set the DDR operating frequency. The available configuration options vary depending on the Front Side Bus settings. Configuration options: [Auto] [DDR2-400MHZ] [DDR2-533MHZ].

Refer to the table below for details.

Available DRAM frequency options in various FSB settings

FSB

 

 

 

Configuration options

 

Auto

DDR2-

DDR2-

DDR2-

DDR2-

DDR2-

 

 

533

667

800

889*

1067*

FSB 1066

FSB 800

 

 

* Provi ded for overclocking purpose only.

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 set the PCI Express frequency. This item is set to [Auto] by default. Configuration options: [Auto] [90]...[150]

PCI Cl ock Synchroni zati on Mode [ Auto]

Allows you to synchronize the PCI frequency with the PCI Express or CPU frequency. Configuration options: [To CPU] [33.33MHz] [Auto]

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Chapter 4: BIOS setup