Size Mid Tower Model Number CA-GR921-R1 (Red-USB 3.0) Drive Bays 9 DRIVE BAYS 3 EXTERNAL 5.25 DRIVE BAYS 2 EXTERNAL 3.5 DRIVE BAYS 4 INTERNAL 3.5 DRIVE BAYS SCREWLESS RAIL DESIGN Fan Support FRONT, 1 X 120 mm LED FAN [Included] REAR, 1 X 120 mm FAN [Included] SIDE PANEL, 1 X 120 mm LED FAN [Included] TOP, 1 x 120/140mm Clearance CPU COOLER CLEARANCE 144.4mm (with fan) 169.4mm (without fan) Dimensions 206mm(W) X 459mm(H) X 522mm(D) Material SECC Steel, ABS Plastic Motherboard Support ATX, MICRO-ATX, BABY AT Expansion Slots 7 I/O Ports 1 x Audio/Mic, 2 x USB 2.0 (1x USB 3.0, 1x USB 2.0 on CA-GR921-R1 and CA-GR921-B1), eSATA, Temperature Display model : CA-GR921-R1 tag : Computer Cases