AOpen AX6BP-TBL User Manual

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Appendix C

Jumper Table Summary

Selecting the CPU Frequency

With the help of Pentium II VID signal and SMbus, this motherboard is jumperless design.

The CPU frequency selection is set by going into:

BOIS Setup à Chipset Features Setupà CPU Clock Frequency

(The possible setting is 66, 68.5, 75, 83.3, 100, 103, 112 and 133.3 MHz)

BOIS Setup à Chipset Features Setupà CPU Clock Ratio

(The possible setting is 1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x, 7x, 7.5x, and 8x)

INTEL Pentium II

CPU Core Frequency

Ratio

External Bus Clock

 

 

 

 

Pentium II - 233

233MHz =

3.5x

66MHz

 

 

 

 

Pentium II - 266

266MHz =

4x

66MHz

 

 

 

 

Pentium II - 300

300MHz =

4.5x

66MHz

 

 

 

 

Pentium II - 333

333MHz =

5x

66MHz

 

 

 

 

Pentium II - 350

350MHz=

3.5x

100MHz

 

 

 

 

Pentium II - 400

400MHz=

4x

100MHz

 

 

 

 

Pentium II - 450

450MHz=

4.5x

100MHz

 

 

 

 

Celeron 266

266MHz=

4x

66MHz

 

 

 

 

Celeron 300

300MHz

4.5x

66MHz

Celeron 300A

300MHz

4.5x

66MHz

 

 

 

 

Celeron 333

333MHz

5x

66MHz

 

 

 

 

Warning: INTEL 440BX chipset supports maximum 100MHz external CPU bus clock, the 103, 112 and 133.3MHz are for internal test only.These settings exceed the specification of BX chipset, which may cause serious system damage.

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Jumper Table Summary

Selecting the CPU Voltage

This motherboard supports Pentium II (Klamath) VID function, the CPU core voltage is automatically detected, the range is from 1.3V to 3.5V.

Clear CMOS

JP14

Clear CMOS

1-2

Normal operation (default)

2-3

Clear CMOS

 

 

Tip: If your system hangs or fails to boot because of overclocking, please clear CMOS and the system will go back to default setting. Except using JP14, you can also press

<Home> key to clear CMOS while system booting.

AGP Ratio

JP23

AGP Ratio

1-2

Auto

3-4

2/3

5-6

1/1

 

 

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