BIOS firmware for the Intel DG41CN desktop motherboard, a G41 chipset board, compressed as an 864 KB RAR. The name does not say whether it is a full chip dump or an update capsule, so inspect the extracted files. A full dump is written to the SPI flash chip with a programmer to revive a board that stays dark after a failed update. Back up the existing chip first, confirm the board model printed on the PCB, and make sure the image size matches the flash capacity before programming.
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 →