LIAN LI PC-O6SX Black Side Panel: Tempered Glass Body Material: Aluminum MicroATX Mid Tower Computer Case Motherboard Compatibility: MicroATX Front Ports: USB3.0 x 4 HD Audio 120mm Fans: Top:120mm fan x3 External 5.25 Drive Bays: 1 (Slim ODD) or 3.5/2.5 HDD x1 External 3.5 Drive Bays: HDD Rack: 3.5 x3 + 2.5 x1 Behind the MB tray: 3.5 x1 + 2.5 x2 or 3.5 x2 or 2.5 x3 On the MB tray: 3.5 HDD x2 or 2.5 HDD x2 (Occupies 2 PCI slot space) Expansion Slots: 4 140mm Fans: Rear:140mm fan x1(Optional) Dimensions (H x W x D): 20.28 x 5.83 x 19.06