Gigabyte GA-8I945PMF User Manual page 26

15) CI (Chassis Intrusion, Case Open)
This 2-pin connector allows your system to enable or disable the "Case Open" item in BIOS, if the
system case begin remove.
16) CLR_CMOS (Clear CMOS)
You may clear the CMOS data to its default values by this jumper. To clear CMOS, temporarily
short 1-2 pin. Default doesn't include the "Shunter" to prevent from improper use this jumper.
GA-8I945PMF Motherboard
Pin No. Definition
1
1
2
Open: Normal
1
Short :Clear CMOS
1
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Signal
GND