Hardware Installation
2-4
2.2 Jumpers
With the help of Pentium II VID signal and SMbus,
this motherboard is
jumper-less design.
The only jumper left is to clear CMOS, which is a
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
Ratio
External Bus Clock
Klamath 233
233MHz =
3.5x
66MHz
Klamath 266
266MHz =
4x
66MHz
Klamath 300
300MHz =
4.5x
66MHz
Klamath 333
333MHz =
5x
66MHz
Celeron 266
266MHz=
4x
66MHz
Celeron 300
300MHz
4.5x
66MHz
