BIOS image for the Gigabyte GA-H81M-S1 motherboard, revision 1.0, intended for an 8 MB flash chip and packed in a 5.59 MB RAR archive. The H81 board uses a 64 Mbit SPI chip, which an external programmer such as a CH341A can rewrite when the board shows no POST after a failed update. Read and save the original contents first, since they hold board-specific data such as the MAC address. Check that the extracted image is exactly 8 MB and that the PCB revision matches.
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 →