BIOS image for the Gigabyte GA-H81M-S motherboard, revision 1.0, marked OK, with no file extension and a size of 4.00 MB. That size suggests a 32 Mbit SPI flash, so check the chip on your board, which may use dual BIOS ICs. Write it with an SPI programmer to revive a board whose firmware is corrupted. Read and save the original chip first, because it may hold the board's MAC address and serial data, and confirm the PCB revision is 1.0.
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 @bios_laptopomi. Enginerys does not host this file.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →