- 12x 3.5" Hot-swap SAS3/SATA Drive BaysN/A2. Optional 2x 2.5" Hot-swap SATA3 Drive Bays for OS mirroringN/A3. SAS3 Single Expander backplane with SES-2 and cascading supportN/A4. Mini-SAS HD 12Gbps connectivity (2 port in & 2 port out)N/A5. 3x 80mm Hot-swap Cooling FansN/A6. 920W Redundant Power Supplies Platinum Level (94%+)N/A7. 7x Low-profile PCI expansion support