6
Technical Reference Booklet
CPU Speed Selection
When JP7 is installed on this motherboard, jumper is required to be set for
different type of CPU installed. The CPU speed is set by JP1, JP2, and JP7,
please see JP7- Ratio of Processor Core to System Bus Frequency table.
When JP7 is not installed on this motherboard, jumperless feature is
implemented such that no jumper is required to be set for different type of CPU
installed.
The CPU speed is set in “CPU Speed Setting” of CMOS Setup.
Notice:
1.
Be sure to save the CMOS setting when exit the CMOS.
2.
When System Bus Frequency is 100MHz, DIMM RAM must be PC100 standard.
3.
When the system is turned on the first time or the CPU is changed, a Pentium
II-133 or -200 (depends on the CPU bus speed) will be recognized and a
warning message of “CPU has been changed” will appear. Please enter the
CMOS setup menu to configure the CPU speed.
JP1, JP2 - System Bus Frequency
JP1
JP2
System Bus Frequency
(Open)
(Open)
133MHz
(Open)
(Close)
100MHz
(Close)*
(Close)*
Auto*
Close Open
JP4
JP28
JP23
JP8
1
1
1
1
1
JP22
JP21
JP20
1
1
JP29
1
* = Default setting.
1
1
1
1
1
1
Warning:
Please turn off AC power before installing and removing any device.
If you can’t turn on system power, please clear CMOS and keyboard
password(JP28). Then try again
This chapter explains how to configure the motherboard’s hardware. Before
using your computer, make sure all jumpers and DRAM modules are set
correctly. Refer to this chapter whenever in doubt.
Jumper Settings
1
JP1
1
JP2
2
1
JP7
