Key Features: 1. 600W Redundant power supplies 2. 4x 3.5" Hot-swap SAS2 (6Gb/s) /SATA Drive Bays 3. 1x Full-height AOC expansion slot 4. 4x 40x28mm high-efficiency fans (2 more optional; 6x fans maximum) 5. 1x USB / COM Port tray in slim DVD bay (optional) 6. Applications: data center, appliance server, space critical application, industrial PC