A BIOS / firmware dump for MSI hardware (board MS-7751). Shared as “BIOS MSI Z77A-GD55 (MS-7751)(REV 1.1).rar” — a .rar file, 5.22 MB.
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 @afsbiosfree. 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.
7-ZipWinRARThe Unarchiver (macOS)
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →