Service data for the ASUS P8H77-V motherboard, an Intel H77 chipset board, stored as a 527 KB RAR archive. The name only states the model, so the exact format becomes clear after unpacking; the size fits a boardview or a schematic set. A technician would use it to find components by designator, follow power rails and locate a short on a dead board. Boardview files open in OpenBoardView, FlexBV and similar programs. Check the revision printed on the PCB first, since part placement can change between board revisions.
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 @boardview. 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.