Decrypted PDF schematic for board V330 at the revision marked 30, probably 3.0, about 1.03 MB in size. Its code resembles the MS-V numbering MSI uses on graphics card PCBs. The diagram lets you follow power from the PCIe connector and slot through the VRM controllers to the GPU and memory, and check enable, power-good and feedback signals. It opens in any PDF reader. Since several V330 revisions are around, compare the number printed on the board 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 @laptexdna. 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.