ASUS P8H77-V LE motherboard archive, a 353 KB RAR whose contents are not described by the name. The board uses the Intel H77 chipset in a desktop ATX form factor, and files of this size are typically boardviews or service schematics. Extract it first to confirm what it holds. Such data lets you highlight nets, locate MOSFETs and capacitors around the CPU VRM and trace standby circuitry when a board will not power on. Compare the PCB revision marking with the document before relying on it.
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.