2-8.1 How To Tackle The Jumpers; 2-8.2 Jfsb1: Cpu Clock Select - SOLTEK 85DR2-DC Manual

2-8.1 How to tackle the Jumpers:

1 2 3
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 with jumper cap.
1
JpX
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 could be damaged.

2-8.2 JFSB1: CPU Clock Select

JFSB1 is designed to select 100/133MHz CPU
clock for the system.
1. Before selecting the CPU clock, read the Iden-
tification Legend on the CPU, find the default
(Max) FSB which can be provided by the CPU.
If this FSB is divided by 4, the result is the
default CPU clock.
2. Setting JFSB1 to 1-2 closed will allow CPU on board to automatically
detect its own frequency and apply it to the System Bus.
3. Setting JFSB1 to 2-3 closed will manually configure a 100MHz CPU to
133MHz.
4. If JFSB1 2-3 closed cannot boot the system, it means overclocking fails.
Please restore JFSB1 to 1-2 closed (default) and then clear CMOS with
the Clear-CMOS Jumper before trying to reboot system. (See Further
Notes on Overclocking.)
A 3-pin Jumper
3 1
Jumper with
all pins open
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
JFSB1
CPU Clock Select
1-2 closed
1
CPU Autodetect
for 133MHz CPU
1
Clock (533MHz FSB)
3
(default)
2-3 closed