3.HARDWARE SETUP

2)CPU External Frequency Selection (DIP_SW Switches 1–4)

This option tells the clock generator what frequency to send to the CPU and SDRAM. This allows the selection of the CPU’s External frequency (or BUS Clock). The BUS Clock multiplied by the Frequency Multiple equals the CPU’s Internal frequency (the advertised CPU speed).

CUA266

DSW

 

 

 

 

ON 1

 

 

 

 

ON 1

 

 

 

 

 

ON 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

CPU→

 

 

 

4

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

66MHz

100MHz

133MHz

SDRAM→

100MHz

100MHz

133MHz

CUA266 CPU External

Frequency Selection

WARNING! Set the CPU frequency only to the recommended settings. Frequencies other than the recommended CPU bus frequencies are not guaranteed to be stable. Overclocking the processor is not recommended. It may result in a slower speed.

3)SDRAM Voltage Selection (JP25V)

This jumper allows you to select the specific voltage supplied to the DDR DIMMs for overclocking. The setting 1-2 allows for +2.5V, while setting 2-3 allows for +2.6V. The default setting is 2.5V.

Motherboard Settings

3. H/W SETUP

JP25V

CUA266

1

2

2

3

+2.5V +2.6V

CUA266 JP25V

WARNING! Using a higher voltage may help when overclocking but may result in shortening the computer components life. It is receommended that you keep this jumper to its default setting.

ASUS CUA266 User’s Manual

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