With Power Supply: No External 5.25" Drive Bays: 3 Internal 3.5" Drive Bays: 6 Front Ports: USB / Audio / IEEE 1394 / e-SATA Motherboard Compatibility: ATX / M-ATX Expansion Slots: 8 140mm Fans: 3 x 140mm Ball-Bearing Front Fan (1200RPM) 2 x 140mm Ball-Bearing Rear Fan (1200RPM) Dimensions(L x W x H): 16.93" x 9.06" x 26.77"