GIGABYTE GA-K8N51GMF-9-RH - Manual (Page 27)

Hardware Installation - 27 -
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16) CLR_CMOS (Clear CMOS)
You may clear the CMOS data to its default values by this header. To clear CMOS, temporarily
short 1-2 pin. Default doesn't include the jumper to prevent from improper use this header.
Open: Normal
Short: Clear CMOS
17) CI (Chassis Intrusion, Case Open)
This 2-pin connector allows your system to detect if the chassis cover is removed. You can
check the "Case Open" status in BIOS Setup.
Pin No. Definition
1 Signal
2 GND
1
1
1