MSI X299 TOMAHAWK AC Quick Start Manual page 52

Updating BIOS with Flash BIOS Button
Before updating:
Please download the latest BIOS file that matches your motherboard model from MSI
website and rename the BIOS file to MSI.ROM. And then, save the MSI.ROM file to the
root of USB flash drive.
Important
Only the FAT32 format USB flash drive supports updating BIOS by Flash BIOS Button.
1. Connect power supply to CPU_PWR1 and ATX_PWR1. (No other components are
necessary but power supply.)
2. Plug the USB flash drive that contains the MSI.ROM file into the Flash BIOS Port
on rear I/O panel.
3. Press the Flash BIOS Button 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.
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BIOS Setup
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