Compressed RAR package for the P8H61-M LX3 desktop motherboard, revision 2.0, 358 KB. The file name gives no description of the contents, so extract it to see whether it holds a boardview, schematic or another service document for this H61-chipset board. Files of this kind help trace power rails, locate components and check signal paths during repair. Before using any data from the archive, check that the model LX3 and revision R2.0 printed on the board match, since earlier revisions can use different layouts.
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.