1-25Chapter 1: Product introduction
1.9 Jumpers
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 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 from the 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 clearing the CMOS, reinstall the battery.
• You do not need to clear the RTC when the system crashes due to overclocking. For
system failure due to overclocking, use the CPU Parameter Recall (C.P.R.) feature.
Afterwards, shut down and reboot the system. The BIOS automatically resets
parameter settings to default values.
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.
P8H61-M LX R2.0
P8H61-M LX R2.0 Clear RTC RAM
1 2
2 3
Normal
(Default)
Clear RTC
CLRTC
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