2-9.1 Jfsb1 & Jfsb2: Cpu Frequency Select - SOLTEK SL-865G3 Manual

SL-865G3 / 865G3-L
How to tackle the Jumpers:
1
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 JFSB1 & JFSB2: CPU Frequency Select
JFSB1 and JFSB2 are designed on board for CPU frequency select.
1. Setting JFSB1 1-2 closed and JFSB2 to 1-2 closed will allow CPU on
board to Auto Detect its own frequency and apply it to the System
Bus.
2. Setting JFSB1 2-3 closed and JFSB2 2-3 closed is for 100 MHz CPU.
3. Setting JFSB1 opened and JFSB2 2-3 closed is for 133 MHz CPU.
4. Setting JFSB1 2-3 closed and JFSB2 opened 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.)
2 3
A 3-pin Jumper
3
JFSB1&JFSB2: CPU Frequency Select
(default)
CPU
100MHz
Auto-
(FSB400)
Detection
JFSB1 JFSB1
1 1
1 1
JFSB2 JFSB2
Chapter 2 Hardware Setup
A 2-pin
Jumper
Cap
The conductor inside the cap
links two header-pins together.
1 3
Jumper with
all pins opened
133MHz 200MHz
(FSB800)
(FSB533)
JFSB1
JFSB1
1
1
1
1
JFSB2
19
1 3
Jumper with
Pin 1-2 closed
JFSB2