How do I clear the CMOS memory to reset BIOS settings?
To clear CMOS and reset BIOS settings, power off your computer and unplug the power cord. Use a jumper cap to short JBAT1 for about 5-10 seconds, then remove the jumper cap from JBAT1. Reconnect the power cord and turn on the system.
From the official Msi Mag B650 Tomahawk Wifi Motherboard manual, page 43
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