BIOS for the ASUS P5N-MX desktop motherboard, a small 485 KB RAR, consistent with the small flash chips used on older boards. No revision or version is stated in the name, so compare the board revision silkscreened on the PCB before use. The image can be written with an external programmer to restore a board after a failed update. Check that the file size matches the flash capacity exactly, and keep a backup of the original chip in case the dump does not suit your board.
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 →