9.VCORE over-voltage (OVER_VOLT)

When enabled, this jumper allows a CPU Vcore setting range of +1.75V to +2.1V for P4 Willamette processor, and a 1.475V to 1.75V range for Northwood processor through BIOS Setup. When disabled, the allowed Vcore settings are lower. (This feature is present on PCB R1.05 or later versions.)

Setting to a very high core voltage may cause permanent damage to the CPU. It is recommended that you keep the default setting (Disable).

OVER_VOLT

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2

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Disable Enable (Default)

P4B

P4B OVER_VOLT Setting

10.Clear RTC RAM (CLRCMOS)

This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The RAM data in CMOS, that include system setup information such as system passwords, is powered by the onboard button cell battery.

To erase the RTC RAM:

1.Turn OFF the computer and unplug the power cord.

2.Remove the battery.

3.Place a jumper cap over the pins for a few seconds to short the jumper. Remove the jumper cap.

4.Re-install the battery.

5.Plug the power cord and turn ON the computer.

6.Hold down the <Del> key during the boot process and enter BIOS setup to re-enter data.

Refer to the illustration on the next page showing the CLRCMOS location on the motherboard.

ASUS P4B motherboard user guide

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