A schematic diagram for MSI hardware (board MS-1671). Shared as “MSI EX630 MS-1671 REV 0A PDF .rar” — a .rar file, 773 KB.
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 @generalbios. 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)