BIOS image for the ASUS B550M-A AC desktop motherboard, board revision R1.03, stated as 32MB and supplied in a RAR archive. The size matches a 256 Mbit SPI flash chip typical of AM4 boards supporting a wide CPU range. It is meant for programming the chip directly with a programmer when the board shows no POST or a failed update. Check the chip capacity on the board, read and save the existing contents, and confirm the revision matches before writing the image.
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 →