Product DescriptionExternal 5.25' Drive Bays, 2 External 3.5' Drive Bays, 1 Internal 3.5' Drive Bays. Up to 3 (including 1 each on side left and right panels). 6 Expansion Slots. Motherboard Compatibility ATX/Micro-ATX/Flex ATX Case. SECC Steel. Power Supply 450W (ATX 2.01v w/ 20+4P, 6P PCIe and 2*SATA) Front Ports: IEEE 1394, 2*USB, Audio. Cooling: 2 x 80mm rear fan, 80mm front fan.