Datasheet in PDF, about 800 KB, identified only by 1366 in the name, most likely referring to the LGA1366 processor socket. The name gives no processor family or document revision, so open it to confirm the exact scope. Socket documents of this kind are used to look up pin functions, supply voltages and signal locations when checking a damaged socket or tracing a CPU power fault. Opens in a standard PDF viewer.
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 .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)