BIOS package for the MSI Z77A-GD55 desktop motherboard, model code MS-7751 revision 1.2, compressed as RAR. The Z77A-GD55 is an Intel Z77 chipset board, and MSI prints the MS-7751 code and revision on the PCB, so compare them before use. The image can be written to the SPI flash chip with an external programmer when the board fails to post after a bad update. Back up the original chip contents first and confirm the image size matches the chip capacity to avoid a failed write.
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.
All sources (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 3 Jan 2022 | Open file on RM Schematics |
| @pepeelectronica | 28 Apr 2022 | Open file on RM Schematics |
| @schematics_bios | 27 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 3 Aug 2026 | Open file on RM Schematics |
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 →