Boardview for the MSI MS-9665 board, supplied as an 852 KB RAR archive. The name gives no revision, so compare the layout against the revision printed on your PCB before relying on it. A boardview shows part placement, net names and pin connections on both sides of the board. That makes it useful for locating test points, following a shorted rail to its source, or finding a missing component. Extract the archive first, then open the file with a viewer such as OpenBoardView, FlexBV or Boardviewer.
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.