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How to tackle the Jumpers:
A 3-pin Jumper
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, all jumper pins covered with
black marks stand for closed pins by jumper caps.
1
Jp X
Jumper with
Pin 2-3 closed
• Do not remove the jumper cap when power is on. Always
make sure the power is off before changing any jumper settings.
Otherwise, mainboard could be damaged.
2-8.1 Jp1: CPU Clock/Overclock Select
Jp1 designed on board for CPU clock select and 100MHz CPU
overclocking. With Jp1, user can choose the way for a 100MHz CPU to
run an overclock on board.
1. If Jp1 is set to 1-2 closed, the auto-detect
m o d e w i l l r e c o g n i z e t h e C P U c l o c k
automatically and send the signal to system
chips. No overclocking will be implimented
in this case. That is, a 100MHz CPU will boot
system with 100MHz CPU clock and provide
4X100 MHz system bus. A 133MHz CPU will
boot system with 133MHz and provide a
4X133 MHz system bus.
2. If Jp1 is set to 2-3 closed, CPU is set at
100MHz, indicating that 133MHz overclock
is not desired. The CPU will boot system with
100MHz even if a 133MHz CPU is used.
3. If Jp1 is set to 1-2-3 all open, CPU is set at
133MHz, indicating that 133MHz overclock
is desired. The CPU will try to boot system
with 133MHz even if a 100MHz CPU is used.
3
3
1
Jumper with
all pins open
25
Chapter 2 Hardware Setup
A 2-pin Jumper cap to link
two header-pins together.
3
1
Jumper with
Pin 1-2 closed
Jp1:
CPU Clock Select
1
1-2 closed (default)
CPU Auto-detect
of
100 / 133MHz
1
2-3 closed
100MHz selected
1
Jumper open
133MHz selected
3
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