To access the interior, simply remove the thumb screws holding each panel in place. The layout within the Genesis Irid 353 ARGB is traditional for a tower case, in every sense. On the bottom is a solid steel shroud with the company and model branding. In the back, two well-placed holes with grommets allow for easy cable routing to the ports on the bottom edge of the motherboard, while a third opening in the front is used to route power cables straight up to any GPU that requires them.
Out of the box, there is a bit of a mess with the ARGB and fan cables, so you will have to spend some time cleaning things up. Towards the front are two sets of mounting holes for 2.5" drives—you may hide two 2.5" units by installing both on this side or show them off by attaching them to the interior facing the windowed side panel. A generic ARGB controller with a built-in fan hub is part of the Irid 353 ARGB. Use it to easily expand lighting elements; it also takes a single motherboard fan header to control the speed/power of all the attached cooling units, which is quite handy as entry-level boards may not offer ARGB headers or enough fan connectors for all the cooling possibilities the Irid 353 ARGB provides.
In the front, underneath the shroud, is a simple hard-drive cage. It may hold one drive within and another such unit on top for a maximum of two 3.5" drives or a mix of one 3.5" and one 2.5" unit. Above that are the two 120 mm fans, as the entire front is meant for active cooling.
Looking at the rear of the chassis, the PSU bay comes with two foam stripes on which your unit will rest. There is generally enough room for a normal unit, but the compact nature of the Irid 353 ARGB forces you to remove the HDD cage to make room if using a huge PSU. The four expansion slots above are accessed through the exterior of the chassis; thus, a metal plate on the side also needs to be detached to pass the securing tip of your expansion card's backplate through and out. In the very top is that third 120 mm exhaust fan.
Looking at the ceiling, how far removed the fan-mounting holes are from the motherboard becomes apparent, as well as the amount of available space towards the front of the case.
All the leads within the Genesis Irid 353 ARGB are sleeved black and of the default variety, so you should have no problems connecting them all to your motherboard.