The rear portion of the case features a standard PSU mount cutout for mounting a power supply. The Nikao F-1 does not include a power supply by default, however most consumers are aware of their power requirements for their systems and will prefer to purchase one to suit their needs. From the inside, I noted two brackets to support the power supply and keep the strain off of the four screws. The middle portion of the Nikao F-1 features an ATX I/O plate which is pre-punched for mouse and keyboard, two serial ports, two USB ports, a network port and one parallel port. To the right of the ATX I/O plate is two 80mm fan mounts. The pre-punched grill is in a spiral pattern and the material that is left should be removed if your wish to maximize air flow inside this case.