MSI X370 GAMING PLUS desktop motherboard BIOS, board code MS-7A33, for a 16 MB SPI flash chip, packed in an 18.2 MB RAR archive. MSI uses MS-xxxx codes as its internal board numbers, printed on the PCB, so check it before flashing. Write the extracted image with an external programmer when the board will not boot or a firmware update has failed, after first reading and keeping a backup of the original chip. The image must equal 16 MB to fit the 128 Mbit chip.
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.
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 →