Gigabyte AMD Socket 939 Processor Motherboard GA-K8N51PVM9-RH User Manual page 27

17) 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 avoid improper use of this header.
18) 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.
Open: Normal
1
Short: Clear CMOS
1
Pin No.
1
- 27 -
Definition
1 Signal
2 GND
Hardware Installation