The CMOS RAM is powered by the onboard button cell battery. To clear the RTC data:

(1) Turn off your computer

(2) Place the jumper cap onto the pinpair 2-3 at least 6 seconds to enable CMOS clearance

(3) Place the jumper cap onto the pinpair 1-2 to disable the effect of CMOS clearance

(4) Turn on your computer until CMOS checksum error appears

(5) Hold down the <Delete> key when boots

(6) Enter the BIOS Setup to re-enter user preferences.

This jumper allows you to select the front side bus frequency of the board.