Archive covering MSI motherboard MS-7920 at revision 1.0, packed as a 731 KB RAR file. Only the board number and revision appear in the name, and no model name or document type is given. MS-prefixed codes are MSI's internal design numbers, visible on the PCB silkscreen. Once you have confirmed a match, the files can be used to measure rails at test points, find shorted components, follow the power-on sequence and locate the SPI flash holding the BIOS.
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 @IT_SERVICE_WORLD. 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.
7-ZipWinRARThe Unarchiver (macOS)