- 1. 920W Redundant High-efficiency Platinum Level (94%+) Power Supply - 2. 12x 3.5" Hot-swap SAS / SATA Drive Bays and optional 2x 2.5" Hot-swap SAS/SATA Drive Bays - on rear side of Chassis - 3. 3x 80mm Hot-swap Cooling Fans - 4. WIO Slots (4x Full-height, Full-length + 3x Low-profile Expansion slots) - 5. SAS/SATA 6Gb/s HDD backplane with SESII - 6. Mini-i-pass (SFF 8087) connectivity (multi lane)