ASUS P5N64 WS Manual De Usuario

2-20

Chapter 2: Hardware information

•  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 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 reboot the system.

1 2

2 3

Normal

(Default)

Clear RTC

CLRTC

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.
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.

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.