Corsair Carbide Series Air 740 - High Airflow ATX Cube Case Motherboard Compatibility: Micro ATX / ATX (Up to 272mm) / Mini-ITX Front Ports: 2 x USB 3.0 port / 1 x Headphone & Microphone External 5.25 Drive Bays: 0 Internal 3.5 Drive Bays: 3 Internal 2.5 Drive Bays: 4 Expansion Slots: 8 140mm Fans: Front: 3 x 120mm or 2 x 140mm (2 x 140mm Included) Top: 2 x 120 / 140mm Bottom: 2 x 120 / 140mm Rear: 1 x 120 / 140mm (1 x 140mm Included)