Key Features1. 500W Redundant Power Supplies 80 PLUS, Platinum Level (94%)2. 16x 3.5" Hot-swap Drive Bays3. 2x Internal fixed 2.5" HDDs (optional)4. 1x Slim DVD-ROM Drive (optional)5. 7x FHFL PCI Expansion slots6. 100% Cooling Redundancy7. Adjustable Air Shroud8. Power Switch and 6 LED Indicators9. SAS/SATA 6Gb/s HDD backplane with SESII