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.
It may be smaller than the F51 but still a standard ATX mainboard covers just one of the available cable management holes.
With room for CPU coolers up to 180mm in height you should be able to fit any model in the F31.
You can fit very long cards (up to 420mm) since the top drive cage is not present in the F31 (you will have to remove the bottom one if you decide to use all PCIe slots).
If you don’t care about using the bottom fan/radiator spot the F31 has enough room for even the longest PSUs in the market.