I recently released a new YouTube video, called “How to Flash the MSI MAG B550M Mortar BIOS with the Flash BIOS Button“. This video walks though and demonstrates all of the steps required to use the BIOS Flash button on this motherboard.
The BIOS Flash button is a special feature that lets you flash the BIOS without having a CPU, RAM, or video card installed. This feature also works on a complete system.
The most common reason you would want/need to do this is if you had a new CPU that was not supported by the existing BIOS version on the motherboard. This feature can also be useful if a more traditional BIOS update (using the M-Flash BIOS utility or the MSI Dragon Center Windows utility) failed.
This situation is happening to a number of people with new Ryzen 5000 Series processors that require a newer BIOS version than was available when the motherboard was manufactured. As newer stock shows up for sale, this will less of a problem.
How to Flash the MSI MAG B550M Mortar BIOS with the Flash BIOS Button
Here are the high-level steps that I show in the video.
Here is the video.
I think this is a useful video right now because the documentation on the product web site and in the motherboard manual is a little sparse. MSI also has a short video about how to do this. I think my video goes into much more detail!
I also have blog post about doing this same type of operation for several other MSI motherboards.
If you have any thoughts or questions about this post, please ask me here in the comments or on Twitter. You can also follow me on Twitter, where I am @GlennAlanBerry. Thank you for reading!