BUILDING THE SYSTEM
As always the purpose of this section is not to build a fully working system but rather to showcase what you can expect from the case at hand in terms of interior space.
The Challenger offers enough interior space to accommodate full ATX sized mainboards (some EATX may fit as well).
There's also enough space for even the largest CPU cooler (although you should have no problem placing a 240mm radiator at the top).
Without removing the top drive cage you can use any graphics card up to 300mm long which is not bad at all.
There's also plenty of room for even the largest PSU (however if you use a very long PSU you will lose half of the bottom cable routing hole).