ATX Mid Tower - Black/Silver. Drive Bays: 4 x 5.25 External/2 x 3.5 External/4 x 3.5 Internal. Expansion Slots: 7. Cooling: Rear 1 x 120mm Nano Bearing Fan Included; Front 1 x 80, 90, 120 or 140mm; Side 1 x 80mm. Front IO: 2 Ports USB 2.0 + HD Audio. PSU: ATX 450w w/ Nano Bearing Fan (PN#: PS-450WX1N)