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6 switch, Switch -22 – Asus P5E Deluxe User Manual

Page 48

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2-22

Chapter 2: Hardware information

2.6

Switch

1. Clear RTC RAM

This switch 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.

To erase the RTC RAM:

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

2. Remove the onboard battery.

3. Move the switch from Disable (default) to Enable. Keep the switch on

Enable for about 5–10 seconds, then move the switch back to Disable.

4. Reinstall the battery.

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

6. Hold down the key during the boot process and enter BIOS setup

to re-enter data.

• You do not need to clear the RTC when the system stops responding 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 limitation, AC power off is required prior using C.P.R.

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

power cord before you reboot the system.

Except when clearing the RTC RAM, never move the CLRTC switch from its

default position, or the system will encounter boot failure!