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2-18 Chapter 2: BIOS setup
Some of the following items appear when you set AI Overclocking to [Manual].
CPU Ratio Control [Auto]
Conguration options: [Auto] [Manual]
The following item appears when the CPU Ratio Control item is set to
[Manual].
Ratio CMOS Setting [12]
Use the <+> and <-> keys to select the CMOS ratio values from 6 to 12.
FSB Frequency [XXX]
Displays the frequency sent by the clock generator to the system bus and PCI
bus. Use the <+> and <-> keys to adjust the FSB frequency. You can also type
the desired FSB frequency using the numeric keypad. The values range from 200
to 800. Refer to the table below for the correct Front Side Bus and CPU External
Frequency settings.
FSB/CPU External Frequency Synchronization
PCIE Frequency [Auto]
Allows you to set the PCI Express frequency.
Conguration options: [Auto] [100] [101]~[149] [150].
DRAM Frequency [Auto]
Allows you to set the DDR2 operating frequency.
Conguration options: [Auto] [DDR2-667MHz] [DDR2-800MHz] [DDR2-1066MHz]
Selecting a very high DRAM frequency may cause the system to become
unstable! If this happens, revert to the default setting.
DRAM Timing Control [Auto]
Allows you to set the DRAM timing control. Conguration options: [Auto] [Manual]
The following items appear when you set the DRAM Timing Control item to
[Manual].
Front Side Bus CPU External Frequency
FSB 1333 333 MHz
FSB 1066 266 MHz
FSB 800 200 MHz