We took the time to place a few of the components needed to build a rig into the NZXT Vulcan to give you some idea of how much room is in the little case. The cables you see in the image below are the connections to the two knobs up front. Each of which can control two fans each.
Here we have the handle installed on the top of the case.
The only thing we found that was slightly different in putting together a rig with the Vulcan was the mounting of the HDD. The HDD requires these plastic black mounts to be placed on the drive first and then inserted into the bay as a whole.
After the motherboard is installed you see it is a tight fit. But this is a mATX case after all. Basically, any size power supply can be used in the Vulcan.