If you are using an unlocked CPU, the item CPU Ratio appears under the AI Overclock Tuner item. You may select your desired ratio from the available options.

CPU Ratio [12]

This field sets the ratio between the CPU Core Clock and the Front Side Bus (FSB) Frequency.

If an invalid ratio is set in CMOS, the actual and setpoint values may differ.

Performance Mode [Auto]

Allows enhanced system performance. Setting to [Turbo] may cause the system to become unstable. If this happens, revert to the default setting [Auto]. Configuration options: [Auto] [Standard] [Turbo]

When you set the AI Overclocking Tuner item to [Manual], the related overclocking items appear.

Configure System Frequency/Voltage

AI Overclock Tuner

[Manual]

 

CPU External Frequency (MHz)

[100]

 

CPU Ratio

[12]

 

DRAM Frequency

[Auto]

 

AGP/PCI Frequency (MHz)

[Auto]

 

CPU VCore Offset to .IV

[Disabled]

 

DDR Reference Voltage

[Auto]

 

AGP VDDQ Voltage

[1.50V]

Select Screen

Performance Mode

[Auto]

Select Item

 

+-

Change Option

 

F1

General Help

 

F10

Save and Exit

 

ESC

Exit

CPU External Frequency (MHz) [XXX] (value is auto-detected)

Indicates the frequency sent by the clock generator to the system bus and PCI bus. The bus frequency (external frequency) multiplied by the bus multiple equals the CPU speed. The value of this item is auto-detected by BIOS and is not manually configurable. The values range from 100 to 400. Refer to the following table for the correct Front Side Bus and CPU External Frequency settings.

Table 4.4.1 FSB/CPU External Frequency Synchronization

 

Front Side Bus

CPU External Frequency

 

 

FSB 800

200 MHz

 

 

FSB 533

133 MHz

 

 

FSB 400

100 MHz

 

 

 

 

 

4-16

 

Chapter 4: BIOS Setup