SILVERSTONE Grandia Series GD10B Aluminum HTPC for ATX / Micro-ATX / SSI-CEB Computer Case Motherboard Compatibility: SSI-CEB, ATX, Micro-ATX External 5.25 Drive Bays: 5.25 x 1 (compatible with 3.5� x 1 or 2.5� x 2) Internal 3.5 Drive Bays: 3.5 x 2 (one compatible with 2.5�), 2.5� x1 Expansion Slots: 7+1 Front USB Ports: USB 3.0 x 2 Front Audio Ports: audio x 1 MIC x 1 80mm Fans: Rear: 2 x 80mm fan slot 120mm Fans: Side Right:2 x 120mm intake fan, 900rpm, 18dBA Left:1 x 120mm fan, 900rpm, 18dBA, compatible with 80mm fan