BIOS image for the Gigabyte GA-B85M-D2V desktop motherboard, revision 2.0, sized for a 4 MB flash chip, delivered as a 2.86 MB RAR archive. The B85 in the model refers to the Intel B85 chipset this micro-ATX board uses. A dump like this is written with an SPI programmer such as a CH341A when the board fails to POST due to corrupted firmware. Read and save the original chip contents first, confirm the chip is indeed 4 MB, and check the board revision on the PCB matches 2.0 before flashing.
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 →