Installing the BTF motherboard inside the FSP M580 Plus works flawlessly. All the openings for the connectors are sized well to allow for easy access to those plugs. On top of that, the bottom of the motherboard leaves just enough of a gap, so you could pre-install fans on the floor and still easily route them to the backside of the board.
Adding a PSU is straightforward as well with plenty of room for potent units. Popping in the GPU is a similarly traditional experience. As you can see, there is virtually no limit in terms of length and there is plenty of space to the side intake fans. You could move those to the floor of the case and install your 360 AIO in the side instead, for example.
While you can secure drives to the floor of the FSP M580 Plus, odds are that you want to hide your drives. The mounting plate in the rear allows for two 2.5" and one 3.5" drive at the same time. While that is perfectly fine, this cover could easily be retooled to allow for two 3.5" drives to co-exist in the case by allowing that second unit to take the place of the two SSDs. Installing storage unto the tray is done with traditional screws. You have to install the 2.5" units first and then may screw down the 3.5" drive through the side mounting holes.
Lastly, adding a CPU cooler in form of a 360 mm AIO in the ceiling is straightforward as well. Thanks to the well-placed holes, you can route the cables out of sight somewhat, but grommets here would have been a little bit of an upgrade. The AIO fits perfectly, with the rear fan clearing it.
With the components installed, the interior of the FSP M580 looks super clean when viewed from the sides. This is naturally due to the BTF board, but also because the daisy-chained fans in the side only having a single cable that is tucked away on the bottom nicely. In terms of cable management, the FSP M580 is excellent, thanks to plenty of hooks to use to secure any loose cables to. The HDD plate gets in the way of the cable route a little bit. If that tray was shorter, then things would be a little easier to combine as well. Looking at the fully assembled system from the front, you can clearly see the BTF connectors due to the way the case uses the same openings on this edge for both the BTF headers or ATX cable routing. Those opting for the white variant of the case will find this extremely distracting, while our black version will at least allow all this to blend into the background a bit better.
Finished Looks
Putting the panels back and turning the system on, that glass looks gorgeous. The RGB elements in the fans are not the brightest, but the silver center on the hubs looks quite nice as well. We did expect the infinity mirrors to be lit too, but those are just a cosmetic addition after all. You will certainly hear that the system is running due to those fans, but there is also a white LED which lights up. The fact that this is not the generic blue one is certainly a nice surprise as well. The RPM displays on the fans are clearly visible and while this is more of a gimmick, having this in real-time for each individual fan is actually pretty fun to see.
Looking at the system from the front, you can see the sticker on the ATX connector for the motherboard as expected. If you look closely, you can see the ARGB element in the front glowing past the edge of the glass panel, but the studio lights manage to overpower it, unfortunately. That said, you should be able to notice this under normal conditions and especially at night.
The main side allows you to view all your components nicely, in the same fashion as the front obviously considering it is the same piece of glass. On the other side, you can see the dim glow of the ARGB elements as the side intake fans shine through the vented portion of the steel panel.
Thanks to the embedded ARGB controller and its dedicated LED button, you can cycle through a bunch of ARGB animations. On top of that the FSP M580 Plus allows you to set seven solid color options as well, as seen below.