With Power Supply: No Power Supply Mounted: Top and Bottom With Side Panel Window: Yes External 5.25" Drive Bays: 12 External 3.5" Drive Bays: No Internal 3.5" Drive Bays: 8 Front Ports: Top Panel: Power On/Off switch, USB3.0 x 2, USB2.0 x 2, e-SATA x 1, Audio in/out x 1 (HD Audio) Motherboard Compatibility: HPTX, XL-ATX, E-ATX, ATX, Micro ATX, ITX