A Closer Look - Inside
To access the interior, simply remove the two thumb screws holding each panel in place. Inspecting the interior layout, it becomes apparent that Zalman is not aiming to re-invent the framing of a good ATX chassis, but instead goes with a trusted and true setup we have seen in a few other cases as well. This includes a solid metal shroud with a cutout in front for a thick radiator—mostly because the front panel is so deep it can easily house any fans. The Z3 Iceberg comes with a complete dual HDD tray setup on the shroud out of the box, which is very nice to see.
Taking a look at the backside of the motherboard tray, you will find two additional 2.5" trays, which makes for a very solid total of four such mounting possibilities. Zalman also placed a basic ARGB controller alongside two useful Velcro cable ties here. The main cable-routing openings have rubber grommets as well, so you should be able to keep the interior of your build clean.
Underneath the shroud is a basic HDD cage, which we have also come across before. I am not a fan of the tray personally as the two tabs to pull it out don't make it easy to do so. You may remove the whole cage as there is a secondary HDD mounting position for either a 2.5" or 3.5" drive on top of it. In the front, you can clearly see the 120 mm fan and all the additional space for more. Naturally, you may also place an AIO of up to 360 mm here instead.
The PSU bay underneath the shroud is pretty straightforward, with small foam tips to keep the unit in place. Above that are the seven expansion slots and removable covers, with a 120 mm ARGB exhaust fan in the very top. Fan placement may be adjusted to align it with your air cooler.
All the cables within the chassis are of the default variety and sleeved black. Owing to the universal ARGB hub, you should have no issues expanding both the cooling and any lighting elements.