User Manual

ASUS P12R-M Series
2-23
2.6 Jumpers
The motherboard illustration is for reference only. The motherboard layout and appearance
may vary depending on the model, but the locations for these jumpers/LEDs/connectors
remain the same.
1. Clear RTC RAM (2-pin CLRTC)
This jumper allows you to clear the CMOS memory system setup parameters by
erasing the CMOS Real Time Clock (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. Short-circuit pin 1-2 with a metal object or jumper cap for about 5-10 seconds.
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.
DO NOT short-circuit the pins except when clearing the RTC RAM. Short-circuiting or
placing a jumper cap will cause system boot failure!
• If the steps above do not help, remove the onboard battery and short the two pins
again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the
battery.
• Due to 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.