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2-10.0 How to tackle the Jumpers:
1
2
If a pin-header (of 2 or more pins) is
designed in such a way that its pins
can be closed or linked together to
set up a specific function, this header
is called a jumper in this manual.
• A Jumper is usually but not necessarily given a "JpX" legend.
• In the Jumper setting diagram, the jumper pins covered with
black marks stand for closed pins with jumper cap.
1
Jp X
Jumper with
Pin 2-3 closed
• Do not remove any jumper cap when power is on. Always
make sure the power is off before changing any jumper settings.
Otherwise, the mainboard will be damaged.
2-10.1 JCLK1 & JCLK2: CPU Frequency Select
JCLK1 & JCLK2 are designed on board to support CPU Frequency se-
lection for booting system.
1. Setting JCLK1 and JCLK2 to 1-2 closed will allow CPU on board to
Auto Detect its own frequency.
2. Setting JCLK1 and JCLK2 to 2-3 closed is for 100MHz CPU or
400MHz FSB to boot system..
2. Setting JCLK1 2-3 closed and JCLK2 all open is for 133 MHz CPU.
3. Setting JCLK1 all open and JCLK2 2-3 closed is for 200 MHz CPU.
4. If an overclock is used to boot system, it may or may not boot your
system. If an overclok fails to boot system, you should restore the
default setting and then clear CMOS to reboot your system. (See
Clear CMOS in next paragraph.)
(default)
AutoDetect
100/
133/
200MHz
1
3
A 3-pin Jumper
3
1
Jumper with
all pins opened
JCLK1& JCLK2:
CPU Frequency Select
133MHz
100MHz
(FSB533)
(FSB400)
1
1
1
1
29
Chapter 2 Hardware Setup
A 2-pin
Jumper
Cap
The conductor inside the cap
links two header-pins together.
3
1
Jumper with
Pin 1-2 closed
200MHz
(FSB800)
1
1
1
3
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