AOpen MX6E PLUS Manual page 18

Hardware Installation
2.2 Jumpers
With the help of Pentium II VID signal and SMbus,
The only jumper left is to clear CMOS, which is a
jumper-less design.
safety hook if you forget the password.
2.2.1 Selecting the CPU Frequency
Pentium II VID signal and SMbus clock generator provide CPU voltage auto-
detection and allow user to set CPU frequency through CMOS setup, no jumper
or switch is needed. The correct CPU information is saved into EEPROM, with
these technologies, the disadvantages of Pentium base jumper-less design are
eliminated. There will be no worry of wrong CPU voltage detection and no need
to re-open the housing if CMOS battery loss.
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 and 83.3 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)
Core frequency = Ratio * External bus clock
INTEL Pentium II CPU Core Frequency
Klamath 233 233MHz =
Klamath 266 266MHz =
Klamath 300 300MHz =
Klamath 333 333MHz =
Celeron 266 266MHz=
Celeron 300 300MHz
2-4
this motherboard is
Ratio External Bus Clock
3.5x 66MHz
4x 66MHz
4.5x 66MHz
5x 66MHz
4x 66MHz
4.5x 66MHz