AOpen AX6BP-TBL User Manual
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 Setup à 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 Setup à 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.
C-1
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
1-2
2-3
AGP Ratio
JP23
1-2
3-4
5-6
AGP Ratio
Auto
2/3
1/1
Clear CMOS
Normal operation (default)
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.
C-2
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