Asus P5Q User Manual download pdf (Page 44)

2-18 Chapter 2: Hardware information

2.6 Jumpers

1. Clear RTC RAM (3-pin CLRTC)

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 onboard button cell battery

powers the RAM data in CMOS, which include system setup information such

as system passwords.

Except when clearing the RTC RAM, never remove the cap on CLRTC jumper

default position. Removing the cap will cause system boot failure!

To erase the RTC RAM

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

2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on

pins 2-3 for about 5~10 seconds, then move the cap back to pins 1-2.

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

4. Hold down the <Del> key during the boot process and enter BIOS setup

to re-enter data.

• If the steps above do not help, remove the onboard battery and move

the jumper again to clear the CMOS RTC RAM data. After the CMOS

clearance, reinstall the battery.

• You do not need to clear the RTC when the system hangs due to

overclocking. For system failure due to overclocking, use the C.P.R. (CPU

Parameter Recall) feature. Shut down and reboot the system so the BIOS

can automatically reset parameter settings to default values.

• Due to the chipset behavior, AC power off is required to enable C.P.R.

function. You must turn off and on the power supply or unplug and plug the

power cord before rebooting the system.

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Asus P5Q User Manual Page 44