Motherboard Installation
Page 8
CPU Speed Selection
•
JP7-JP10 for frequency ratio setting
The table below shows the jumper setting for the Pentium II and Celeron. CPU and it based on its
internal clock speed.
Internal CPU speed (Mhz)
100 / 66 Mhz bus speed
External Bus
6ABX / 6ALX
JP10
JP9
JP8
JP7
Frequency
Ratio
350 / 233
100 / 66 Mhz
[close]
[close]
[open]
[open]
3.5x
400 / 266
100 / 66 Mhz
[close]
[open]
[close]
[close]
4x
450 / 300
100 / 66 Mhz
[close]
[open]
[close]
[open]
4.5x
500 / 333
100 / 66 Mhz
[close]
[open]
[open]
[close]
5x
*Celeron is running at 66Mhz bus only
*Please refers to your CPU specification for proper jumper setting.
Voltage Regulator Output Selection
As mentioned before, the on-board regulator makes use of the VID capabilities to automatically adjust
its voltage output to match that of the installed processor. Therefore, jumper setting is no longer
required for this item on PENTIUM II CPU.
66 Mhz support on 6ABX
The 6ABX main board is optimal for 100 Mhz bus design, 66Mhz bus on this board is not
recommended. However, if you want to use a 66Mhz CPU, we provide a jumper for you to slow down
the bus for this option.
Jumper
JP3
66Mhz
CLOSE
100Mhz
OPEN
CMOS Reset
If you want to reset the CMOS data, you need to turn off the main power switch of the system power
supply and remove the jumper and reinstall it. After the CMOS reset, all the system BIOS
configuration will lose at all and please re-enter the CMOS setup screen to setup the system again.
Jumper
JP2
Normal
1-2
Reset
2-3
