Jbat1: Clear Cmos (Reset Bios) Jumper; Power1, Reset1: Power Button, Reset Button - MSI X399 GAMING PRO CARBON AC Quick Start Manual

JBAT1: Clear CMOS (Reset BIOS) Jumper

There is CMOS memory onboard that is external powered from a battery located on
the motherboard to save system configuration data. If you want to clear the system
configuration, set the jumpers to clear the CMOS memory.
Resetting BIOS to default values
1. Power off the computer and unplug the power cord
2. Use a jumper cap to short JBAT1 for about 5-10 seconds.
3. Remove the jumper cap from JBAT1.
4. Plug the power cord and power on the computer.

POWER1, RESET1: Power Button, Reset Button

The Power / Reset button allows you to power on / reset the computer.
30
Overview of Components
Keep Data
(default)
Power button
Clear CMOS/
Reset BIOS
Reset button