RAIDMAX Sigma Sigma-TWS White Steel / Plastic / Tempered Glass ATX / BTX Tower Computer Case Motherboard Compatibility: Micro ATX / ATX / Mini-ITX Front Ports: 2 x USB 3.0 / 2 x HD Audio 120mm Fans: Front: 3 x 120 mm or 2 x 140 mm fan (optional) Top: 2 x 140 mm / 120 mm (optional) Power Supply Mounted: Bottom External 5.25 Drive Bays: 0 Internal 3.5 Drive Bays: 2 (Compatible with 2.5 HDD or SSD) Internal 2.5 Drive Bays: 2 + 2 (convert from 3.5 HDD brackets)