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865Pro-FGR
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.
2-9.1 JCLK1 & JCLK2: CPU Frequency Select
JCLK1 and JCLK2 are designed on board for CPU frequency select.
1. Setting JCLK1 and JCLK2 1-2 closed will allow CPU on board to
Auto Detect its own frequency and apply it to the System Bus.
2. Setting JCLK1 and JCLK2 2-3 closed is for 100 MHz CPU.
3. Setting JCLK1 open and JCLK2 2-3 closed is for 133 MHz CPU.
4. Setting JCLK1 2-3 closed and JCLK2 open is to select a CPU clock
at 200 MHz for your CPU. If 200MHz is an overclock for your CPU, 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)
Detection
1
3
A 3-pin Jumper
3
1
Jumper with
all pins opened
JCLK1&JCLK2: CPU Frequency Select
100MHz
CPU
Auto-
(FSB400)
1
1
1
A 2-pin
Jumper
Cap
The conductor inside the cap
links two header-pins together.
3
1
Jumper with
Pin 1-2 closed
133MHz
200MHz
(FSB533)
(FSB800)
1
1
1
1
30
3
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