Asus P5K/EPU User Manual download pdf (Page 81)

ASUS P5K/EPU

4-17

CPU Ratio Control [Auto]

Conguration options: [Auto] [Manual]

The following item appears when the CPU Ratio Control item is set to

[Manual].

Ratio CMOS Setting [9]

Sets the ratio between CPU Core Clock and the FSB Frequency.

Use the <+> and <-> keys to select the CMOS ratio values from 6 to 9.

FSB Strap to North Bridge [Auto]

FSB Strap will be adjusted automatically by FSB Frequency and DRAM Frequency.

Conguration options: [Auto] [200MHz] [266MHz] [333MHz].

FSB/CPU External Frequency Synchronization

FSB Frequency [333]

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 FSB frequency. You can also type the desired CPU 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.

Front Side Bus CPU External Frequency

FSB 1066 266 MHz

FSB 800 200 MHz

The following two items only appear when you set the Ai Overclocking item to

[Manual].

PCIE Frequency [Auto]

Allows you to set the PCI Express frequency.

Conguration options: [Auto] [100] [101] ~ [149] [150]

DRAM Frequency [Auto]

Allows you to set the DDR2 operating frequency.

Conguration options: [Auto] [DDR2-667MHz] [DDR2-800MHz] [DDR2-835MHz]

[DDR2-887MHz] [DDR2-1002MHz] [DDR2-1066MHz] [DDR2-1111MHz]

[DDR2-1335MHz]

• Selecting a very high DRAM frequency may cause the system to become

unstable! If this happens, revert to the default setting.

• The conguration options of the DRAM Frequency item may differ

according to the CPU and the DIMM(s) you install.

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Asus P5K/EPU User Manual Page 81