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6 jumpers, Jumpers -24 – Asus P6TD Deluxe User Manual

Page 52

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2.6

Jumpers

1. Clear RTC RAM (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!

• 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.

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 key during the boot process and enter BIOS

setup to re-enter data.

2-24

Chapter 2: Hardware information