BUILDING THE SYSTEM
As always the purpose of this section is not to build a functional system but rather to showcase what you can expect from the case at hand in terms of interior space.
Even an ATX sized mainboard takes most of the available space inside the chassis.
In case you're wondering the answer is no, the P7-C1 doesn't have room for EATX sized mainboards.
There's plenty of room inside the chassis for cooling solutions so you can choose to either mount a 240mm radiator at the top and a 240/280/360mm radiator at the front (our 360mm radiator didn't fit) or go with a regular CPU air cooler.
With enough space for even the longest graphics cards (the GeForce GTX 590 is one of the longest ones to ever be released) you should have no problem mounting a front radiator.
Unfortunately the PSU area is quite limited but you can always remove the drive cage to install a longer PSU model if you don't have any 3.5" drives.