BIOS for the Gigabyte GA-G31M-ES2C desktop motherboard, revision 2.0, packed in a RAR archive. The G31 in the name points to the Intel G31 chipset. Gigabyte boards of this era often carry DualBIOS, and a dump like this is used to rewrite a corrupted flash chip with a programmer when the board will not POST. Check that the PCB revision is 2.0, since images for other revisions may not work. Save the original chip contents first, and confirm the file size matches the 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 →