BIOS firmware for the MSI MAG B550M MORTAR desktop motherboard, an AMD AM4 micro-ATX board, supplied as an 18.2 MB ZIP archive. Unpack it to find the image, then decide whether to flash it through the board's own update tools or write it directly to the SPI chip with a programmer when the board no longer boots. The name gives no version number, so check the contents against your needs. Always read and keep the original chip first and make sure the image size equals the flash chip capacity before writing.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
All sources (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 13 Jan 2022 | Open file on RM Schematics |
| @pepeelectronica | 24 Apr 2022 | Open file on RM Schematics |
| @schematics_bios | 24 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 1 Aug 2026 | Open file on RM Schematics |
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →