	Sign In Sign-Up

1021 Motherboard Jumpers

CMOS Clear Jumper (JBAT1)

Jumper Position	Function
1 - 2	Normal/Save CMOS settings
2 - 3	Clear CMOS settings

Caution

When clearing the CMOS settings, the power cord must be unplugged (since the standby power for the PIIX4E chipset comes from the power supply) and let the system rest for five seconds for the power to clear before returning the jumper to the Normal position.

Onboard VGA Jumper (JVGA1)

Jumper Position Function

1 - 2 Enable onboard VGA

2 - 3 Disable onboard VGA

Jumper Position	Function
1 - 2	Enable onboard VGA
2 - 3	Disable onboard VGA

Power-On Mode Jumper (JP1)

Jumper Position Function

1 - 2 Boot up when power button is pressed.

None Immediate boot up when power cable is connected.

Jumper Position	Function
1 - 2	Boot up when power button is pressed.
None	Immediate boot up when power cable is connected.

CPU Bus Frequency Selection Jumper (JK1)

Jumper Position Function

Closed Automatically detect 66MHz and 100MHz CPU Bus Frequency.

Open Virtually set 66MHz CPU Bus Frequency into 100MHz.

Jumper Position	Function
Closed	Automatically detect 66MHz and 100MHz CPU Bus Frequency.
Open	Virtually set 66MHz CPU Bus Frequency into 100MHz.

AGP Bus Frequency Selection Jumper (JK2)

Jumper Position Function

Closed 66MHz AGP Bus Frequency

Open AGP Bus Frequency same as CPU Bus Frequency.

Jumper Position	Function
Closed	66MHz AGP Bus Frequency
Open	AGP Bus Frequency same as CPU Bus Frequency.