The interior of the case is not overly spacious, but it is ergonomic. Apart from the standard power button, reset button, power on LED and hard disk drive activity LED lights which are somewhat standard, there is a stand-alone Molex connector which is used to power the lights at the front of the case. As well as these, there are the cables which make the front ports of the case usable. NZXT placed considerable attention on these cables since they provide both a solid connector for easy installation and also separated wires in case your motherboard does not follow the standard design. The headphones/microphone cable is even more practical, since it offers two solid connectors (one for Intel HD motherboards and another for AC97 motherboard) and separate wires as well.

All of the drives and PCI cards can be installed inside the case without the use of any specialist tools. The only tool you will need is a standard Philips screwdriver in order to install the motherboard. You can install any 5.25” drive and the visible 3.5” drives inside the case and simply lock them by pushing the locks forward and securing them. The hard disk drives bay is placed sideward, with the rear of the disk drives facing the window panel of the case. You can install the hard disk drives with the help of the included drive rails. The drive bay is removable, but not as easily as you would like to think. You will have to remove the two screws beside the drive bay and another two screws which secure the drive bay from beneath the case before pulling it outside.

At the rear of the case, nothing of real interest exists except for the 120mm exhaust fan. NZXT went with a simple, solid black 120mm fan this time. A clear blue LED fan would be nice here as well, but it would probably make the interior of the Apollo too bright. Motherboard standoffs are not installed when you receive the case.