Intel GA-N680SLI-DQ6 - Manual (Page 34)

GA-N680SLI-DQ6 Motherboard - 34 -
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Short: Clear CMOS
23) CLR_CMOS (Clear CMOS)
You may clear the CMOS data to its default values by this header. To clear CMOS, temporarily
short the two pins. Default doesn't include the jumper to avoid improper use of this header.