MSI B450 GAMING PLUS MAX - Updating BIOS with Flash BIOS Button

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

Before updating:
Please download the latest BIOS file that matches your motherboard model from MSI
®
website and rename the BIOS file to . And then, save the  file to the
root of USB flash drive.
Important
Only the FAT32 format USB flash drive supports updating BIOS by .
1. Connect power supply to  and . (No other components are
necessary but power supply.)
2. Plug the USB flash drive that contains the MSI.ROM file into the  Port
on rear I/O panel.
3. Press the to flash BIOS, and the LED next to the button starts
flashing.
4. After the flashing BIOS process is 100% completed, the LED would be off
simultaneously.