LIAN LI PC-O5X Black Side Panel: Tempered Glass Body Material: Aluminum Mini Chassis Computer Case Motherboard Compatibility: Mini-ITX Front Ports: USB3.0 x 2 HD Audio External 5.25 Drive Bays: 1 (Slim ODD) or 3.5/2.5 HDD x1 External 3.5 Drive Bays: HDD Rack: 3.5 x2 + 2.5 x1 Behind the MB tray: 3.5 x1 + 2.5 x1 or 2.5 x2 On the MB tray: 3.5 x1 + 2.5 x1 or 2.5 x2 (Occupies 2 PCI slot space) Expansion Slots: 3 140mm Fans: 140mm fan x1 Max GPU Length Allowance: 190 mm Max CPU Cooler Height Allowance: 70 mm