Asus P5E Deluxe - Ai Lifestyle Series Motherboard, User Manual

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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 <Del> 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!