The Abaddom's two side panels are secured by a set of thumb screws, which is standard fare. They conceal a relatively well-equipped interior with space for ATX and micro ATX motherboards, five 3.5" drives, four 5.25" devices, 7 PCI expansion slots, and graphics cards up to 280mm in length. There is 170mm of space between the motherboard tray and side panel wall for fan-equipped CPU coolers. Builders can opt to install a radiator for water cooling. Power supplies will sit atop a set of four metal posts for support. Builders have the option of mounting a single 80mm or 120mm intake directly in front of the PSU. PSU cables are fed through a 90mm x 25mm opening to a 10mm deep space on the other side of the motherboard tray. There is a 120mm x 135mm cutout to facilitate mounting a CPU cooler bracket. Sentey includes a set of cable ties for use on three tie down points. Cable management should be a simple affair, as there are many nooks, crannies, and cutouts for routing wires. I particularly like the hole at the top of the drive cages, which offers an easy way to banish all of those connections for the front panel. Speaking of those connections, it turns out the the front USB 3.0 port is hampered by a pass-through that will need to be routed to your motherboard's external connections.
The tool-less system for the 5.25" bays is dead simple. Setting a device free or locking it down is accomplished with a quarter turn of the red retainer dials in either direction. The same goes for the aluminum drive trays below. Simply unclip the red handles from the sides of the tray, place your device accordingly, then clip the handles back into place. Three small studs protrude from each handle to secure the drive. I foresee a couple of these thin extrusions snapping off over time, but the rest of the assembly was satisfyingly sturdy. At first glance, it may look as though the back plate on these trays will block the necessary drive connections. Testing revealed that the drive is to be seated backwards, which I find very strange, but harmless. Each tray has holes drilled to accommodate 2.5" SSDs in addition to a dedicated 60mm cooling fan. One of these fans ships with the case.
Between the 3.5" trays and 5.25" rack lies a mounting location for a fifth 3.5" device. It appears as though Sentey has designed this hard point with the intent of mounting the drive backwards so that its cables run through a hole routed just above the front fan. It is difficult to identify the purpose of this feature, although I'm guessing this is part of Sentey's advertised "Hidden Cable System." Should you own an impressive 3.5" drive like the Western Digital Velociraptor and want to show it off, this would be a good place to put it.
The four 120mm fans included with the Abaddom do an impressive job of setting its interior awash with blue light. Performance and noise was average for typical case fans. Should one desire to replace the two upper 120mm fans, the top panel can be removed by pinching three sets of metal tabs. A dense foam filter provides a protective barrier for that intake. The front fan is affixed to a steel panel that is secured by four screws. Filtration for the front fan is accomplished by another dense foam filter. Being that it's held in place by nothing more than a couple of bent metal tabs, the filter seems haphazardly placed, but it gets the job done. Just another example of where Sentey managed to cut the cost of this chassis without making any major sacrifices.