How do I update the BIOS using the Flash BIOS button?
Download the latest BIOS file from MSI’s website, rename it as MSI.ROM and place it on a USB drive. Connect power cables to CPU_PWR1 and ATX_PWR1 without installing CPU or memory. Insert the USB drive into the Flash BIOS port at the back of the motherboard and press the Flash BIOS button to start updating.
From the official Msi Mag B650 Tomahawk Wifi Motherboard manual, page 58
Have a follow-up question?
Answers from the official manual.
Common questions