Drive Bays Hot-swap 12x 3.5" Hot-swap SAS3/SATA drive trays and Optional 2x 2.5" Hot-swap SATA3 Drive Bays for OS mirroring SAS or enterprise SATA HDD only recommended Backplane SAS3 Single Expander Backplane features: Up to 12Gbps support In-band SES-2 Enclosure Management Support SAS3/SATA3 support 4x Mini-SAS HD connectors Scalability through cascading Front Panel Buttons Power On/Off button System Reset button System Cooling Fans 3x 80mm 7K RPM Chassis middle fan w/ housing Power Supply with Power Distributor 920W high-efficiency (94+%) power supply with PMBus AC Input 100-240 V, 50-60 Hz, 11-4.4 Amp DC Output 4 Amp at +5V standby 75 Amp at +12V With Power Distributor +5V: 45 Amp +3.3V: 24 Amp -12V: 0.6 Amp Certification Platinum Level Certified94%+ Platinum Certified Regulatory (Power Supply) Power Supply Safety / EMC USA - UL listed Canada - CUL listed Germany - TUV Certified EN 60950/IEC 60950-Compliant CB Report CCC Certification Item Dimension (L"xW"xH"): 7.48 x 6.1 x 2.17