FACTORY DIRECT ITEM ONLY 1200W high-efficiency (1+1) redundant power supply (Gold Level 93%). 16x 3.5" Hot-swappable SAS/SATA Drive Bays. 1 x Slim DVD-ROM Drive (optional). 6Gb/s SAS2 Expander. Mini-I-Pass (SFF 8087) connectivity. 3x 8cm Hot-swap 4-pin PWM Fans. 2x 8cm Rear-exhaust 4-pin PWM Fans. Palletized package for secure transportation. Optional 3x slim 2.5" Internal Fixed HDD. BLACK