2-9.1 Jclk1&Jclk2: Cpu Frequency Select - SOLTEK SL-PT880E-R Manual

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 1-2 closed and JCLK2 to 1-2 closed will allow CPU on
board to Auto Detect its own frequency and apply it to the System
Bus.
2. Setting JCLK1 2-3 closed and JCLK2 2-3 closed is for 100 MHz CPU.
3. Setting JCLK1 2-3 closed and JCLK2 opened is for 133 MHz CPU.
4. Setting JCLK1 opened and JCLK2 2-3 closed 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
1
3
A 3-pin Jumper
3 1
Jumper with
all Pins open
JCLK1&JCLK2: CPU Frequency Select
CPU
100MHz
Auto-
(FSB400)
JCLK1 JCLK1
1
1
JCLK2 JCLK2
27
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
133MHz 200MHz
(FSB533) (FSB800)
JCLK1 JCLK1
1 1
1 1
JCLK2 JCLK2
3