With the modular FreeForm system of the MasterCase Pro 6, the PC can be adjusted, adapted and upgraded. Behind the flat, smooth wall panels and a large side window, which can be easily removed and replaced using a magnet, it is possible to install additional elements for improved PC performance in the home, at gaming locations or in the office. Thin air slits at all four corners assure good ventilation, which can be additionally increased by letting the wall panels above and at the front spring open by gently lifting them. A removable rear component can conceal untidy hanging cables.