Firmware dump for MSI board MS-7770, version 1.0, which the name describes as a fully working BIOS. The RAR archive is slightly larger than other MS-7770 packages, so it may contain extra files or a different dump. Technicians typically flash such an image onto the motherboard's SPI chip with a hardware programmer when the board fails to post after a bad update. Back up the existing chip contents first, and verify the board version printed on the PCB and the chip capacity before writing.
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 →