Chapter 2
8
L
1
R
GND
Clear CMOS Data (JP1)
To clear the contents of the CMOS, please follow the steps
below.
1. Disconnect the system power supply from the power source.
2. Set the jumper cap at location 2~3 for 5 seconds, then set it back
to the default position.
3. Connect the system's power and then start the system.
4. Enter BIOS's CMOS Setup Utility and choose Load Setup
Defaults. Type Y and press enter.
5. Set the system configuration in the Standard CMOS Setup
menu.
External Clock Frequency (JP2A/JP2B)
This jumper allows the system bus frequency to be determined
either by CPU or the user. If set both JP2A/JP2B pins to 1-2, the
CPU determines the system bus frequency speed. Set both JP2A/
JP2B pins to 2-3 for 66MHz FSB, set only JP2B pins to 2-3 for
100MHz FSB and leave both JP2A/JP2B pins open for 133MHz
FSB.
CPU Frequency Ratio (JP4)
This feature allows you to set a CPU at a
higher frequency clock ratio than it's speci-
fication allows. it may or may not run at that
ratio, depending on the quality of your CPU
and the extent to which the ratio has been
overset.
Power On By USB (JP6/JP6A)
This board is able to be turned on by a USB keyboard
hot key or a USB mouse click.
To use this function, select
a hot key of your choice at the USB Resume From S3 option
under Wake Up Events in the BIOS's Power On Management
screen. You must also set both jumper's cap to pins 2-3 to use
this function.
CD-ROM Audio-in (CN2)
Use the audio cable enclosed with your CD-ROM disk drive to
connect the CD-ROM to your mainboard. This will enable your
CD-ROM's audio function.
FSB
JP2A
JP2B
Auto
1~2
1~2
66
2~3
2~3
100MHz
Open
2~3
133MHz
Open
Open
Pin
Definition
1~2
Normal (default)
2~3
Clear CMOS Data
This option will not work with
frequency lock CPU.
Pin
Definition
1~2
Disable (default)
2~3
Enable
RATIO
5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 4/10.5 11 4.5/11.55/12
A OFF ON ON OFF OFF ON OFFOFF ON ON ON OFF
ON
OFF
B OFF ON ON ON ON OFF ON ON ON OFF OFF OFF OFF
OFF
C OFF ON OFF ON OFF ON ON OFF OFFOFF ON ON
OFF
ON
D ON OFFOFF OFF OFF OFF ON ON ON OFF ON OFF
ON
ON