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2-8.4 JBAT1 : Clear CMOS
When you have problem with rebooting your system, you can clear CMOS
data and restore it to default value. To clear CMOS with Jumper JBAT1,
please follow the steps below:
1. Power off system.
2. Set JBAT1 to Pin 2-3 closed.
3. After 2 or 3 seconds, return the JBAT1 setting to Pin1-2 closed.
4. CMOS data are restored to default. Remember never clear CMOS
when system power is on.
2-8.5 JP3: AGP 4X Safeguard
1. The AGP slot on board supports 1.
5V AGP 4X card only. Any 3.3V AGP
2X card will burn the 1.5V circuitry.
Jp3 is designed on board to safe-
guard the AGP slot against the 3.3V
AGP 2X card.
2. Default setting of Jp3 1-2 closed is to
enable the safeguard, allowing 1.5V
AGP 4X card to boot system only. In
this case, if system cannot boot with
an AGP card inserted in AGP slot, it
indicates that the AGP card is not one
of 1.5V type.
3. Setting Jp3 2-3 closed will disable the safeguard, allowing the onboard
VGA to boot system.
Warning: If a 3.3V AGP 2X card is now mistakenly inserted for booting
the system, the high voltage will burn the 1.5V circuitry on board. Never
use a 3.3V or an unknow AGP card on this mainboard.
JBAT1
Clear CMOS
1-2 closed (default)
To hold data
1
2-3 closed
To clear CMOS
1
Jp3:
1
1
29
Chapter 2 Hardware Setup
AGP4X Safeguard
1-2 closed
(default)
Safeguard Enabled
1.5V AGP 4X Card to boot system only
2-3 closed
Safeguard Disabled
Onboard VGA or AGP 4X Card to boot
s ystem (Warning: 3.3V AGP card will
cause 1.5V circuit burn.)
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