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 RAM data in CMOS, that include system setup information such as system passwords, is powered by the onboard button cell battery.
To erase the RTC RAM:
1.Turn OFF the computer and unplug the power cord.
2.Remove the battery.
3.Place a jumper cap over the pins for a few seconds to short the jumper. Remove the jumper cap.
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
to clear CMOS