MSI 870-C45 FX V2series User Manual page 22

Clear CMoS Jumper: JBAt
there is a CMoS rAM on board with an external battery power supply to preserve
the system configuration data. With the CMoS rAM, the system can automatically
boot oS every time it is turned on. if you want to clear the system configuration,
use the button to clear data. press the button to clear the data.
JBAt
1 1 1
keep data Clear data
iMportANt
you can clear CMoS by shorting 2-3 pin while the system is off. then return to
-2 pin position. Avoid clearing the CMoS while the system is on; it will damage
the mainboard.
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