Re: Z490 Dark KingPin - what are these headers?
2021/02/05 10:19:38
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Maybe. I sent a PM so I'll see if that gets a response. With a bit of searching, I found the following;
Back in the good old days (ancient history) the J1 jumper was a set of three small pins at the bottom front of a motherboard. There was a tiny plastic block that could be used to short two of the three pins. Shorting pins 1 and 2 was for normal operation. Shorting pins 2 and 3 would clear the CMOS and reset the system setup configuration to default settings. We usually used the J1 jumper to restore default settings because we experimented with settings in BIOS and things didn't exactly go according to plan. Modern motherboards now come with a simple pushbutton to clear the CMOS.
This may or may not be what the header is, but not sure why that would still be there when there's separate buttons for that now.