BIOS image for the ECS H61H2-AD desktop motherboard, apparently from an X3990 system, judging by the name, supplied as a 2 MB RAR. The H61 in the model points to the Intel H61 chipset family, and these boards store firmware in an SPI flash chip. Technicians use such a dump to recover a board with corrupted firmware by writing it with an external programmer. Read and save the existing chip first, confirm the board model on the PCB, and make sure the image size matches the flash chip capacity.
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 →