Assembly

The Motherboard is secured using classic screws and spacers. As you can see, there is plenty of room above the board with well placed openings to plan for cables. In addition to that, wide E-ATX boards are also possible, but you will have to plan to install your SSDs here before adding a motherboard and will loose access to the side cable routing openings. Large GPUs will easily fit as well and the PNY 4080 perfectly aligns with the opening in the shroud, meaning that a push/pull liquid cooling setup should be possible as well.


Adding a 2.5" drive on the tray utilizes screws as well, but you may easily install it by remove the trays of your choice and mounting it before putting it all back unto the backside of the motherboard tray.


Classic 3.5" hard drives follow the same method, with black mounting screws that are applied with the cage outside of the chassis. Thanks to the rubber mounted guiding screws, you can easily slide the whole contraption into one of the top positions and it will hold in place securely enough so that you can forgo the one black thumb screw while your system remains stationary.


Adding a power supply is done by traditional means as well using screws. There is plenty of room, so potent and long units will easily fill without compromise.


Montech advertises the ability to hold a 360 mm radiator at the top of the chassis and thanks to the well placed mounting holes, doing so presents no issues at all, with ample room for cable management at the top of the motherboard. The unfortunate downside is that you will have a harder time keeping your cable mess well hidden due to the lack of grommets on these openings.


With everything installed, the Montech Air 903 Base makes a good impression in terms of cable management cleanliness in the interior of the chassis. We opted to route the GPU power wire through the opening right under the edge of the motherboard, as that looks a tad bit cleaner than utilizing the opening at the front edge of the shroud. The only thing you need to watch out for is the bend radius of that power wire. Thankfully the AIO hides all the wiring at the top of the chassis. On the backside things can be tidied up very nicely, thanks to the well placed hooks for zip ties in combination with the three Velcro strips - even with a total of six fans installed in the finished system.

Finished Looks

With the panels back in place, and the system turned on, there are not a lot of visual clues from the Montech Air 903 Base to let you know it is up and running. The only out-of-the-box element is the blue LED at the top, around the square power button.


Thanks to the clear window, you can see all the components easily - even without additional glow from ARGB fans considering this is the black version of the Montech Air 903 Base. In the rear, everything is where you expect to see it. One noteworthy element is the fact that the seven PCI slots are bridgeless, so that you should be able to employ universal vertical GPU mounting brackets.