BIOS archive for the MSI MAG B550 Tomahawk motherboard, model code MS-7C91, about 30.1 MB in RAR. No version is stated in the name, so check the contents for the release number. MSI boards of this type often support Flash BIOS Button updates from USB, while a hardware programmer is used if the SPI chip itself is corrupted. Confirm the MS-7C91 code on the PCB, back up the original chip before writing, and ensure the image size matches the flash capacity.
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 (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 8 Jun 2023 | Open file on RM Schematics |
| @generalbios | 4 Nov 2024 | Open file on RM Schematics |
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →