It is best to flash your BIOS with a UPS installed to provide backup power to your system. A power interruption or failure during the flash will cause the upgrade to fail and you will not be able to boot the computer. ... Flashing your BIOS from within Windows is universally discouraged by motherboard manufacturers.

What is BIOS back flash?

BIOS Flashback helps you to update to new or old motherboard UEFI BIOS versions even without a CPU or DRAM installed. This is used in conjunction with a USB drive and the flashback USB port on you rear I/O panel.

What happens if you don't flash BIOS?

BIOS flashing tools usually try to detect whether the BIOS fits your hardware, but if the tool attempts to flash the BIOS anyway, your computer could become unbootable. If your computer loses power while flashing the BIOS, your computer could become “bricked” and unable to boot.