COUGAR QBX Mini-ITX Computer Case Standard ATX PSU Compatibility Power Supply Motherboard Compatibility: Mini-ITX Front Ports: 2 x USB 3.0 / Audio 120mm Fans: Top 120mm Fans x 2 (optional) Bottom 120mm Fans x 2 (optional) Left Side 120mm Fan x 1 or 240mm radiator with a single 120mm fan or 120mm radiator with a 120mm fan Internal 3.5 Drive Bays: 1 Internal 2.5 Drive Bays: 4 Expansion Slots: 1