How do I clear the CMOS/RTC RAM to reset BIOS settings or recover a forgotten BIOS password?
To erase the RTC RAM, turn off the computer and unplug the power cord, then short-circuit pin 1-2 of the CLRTC jumper with a metal object or jumper cap for about 5-10 seconds. Plug the power cord back in, turn on the computer, and hold down the <Delete> key during boot to enter BIOS setup and re-enter your data. If this does not help, remove the onboard battery, move the jumper again to clear the CMOS, then reinstall the battery after clearance. (Page 1-9)
From the official ASUS Rog Strix B450 F Gaming Motherboard User manual, page 9
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