With our broad work area established, we’re finally ready for the first step in building our PC! Unbox the PSU, account for all the parts, and lay it next to the case on the work surface.
Lay out the bags of cables and clips in an orderly fashion. Remember to discharge yourself from any static electrical buildup before mounting the PSU inside the case. And just as we did with the 500R PC case, we should verify that the RM850 box contains the advertised inventory, as Figure 3, Make sure all parts are accounted for before installing the PSU shows.