BIOS image for an X450CC motherboard at revision 2.3, compressed to about 3.39 MB. The name says the Management Engine region was cleaned and that the dump was tested and confirmed working. ASUS-style revision numbering like this must match the marking on the PCB, since different revisions can use different firmware layouts. Write it to the SPI flash chip using an external programmer, after first reading and saving the existing contents, and confirm the image size matches the chip so it fits without truncation.
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 →