Processor Support Supports Dual, Single Intel / AMD Processors Expansion Slots 7 x Low Profile Expansion Slots Drive Bays Hotswap: 24 x 2.5inch SAS/SATA Hotswap Drive Trays SAS or Enterprise SATA HDD Only Recommended Backplane 2U Direct Attached Backplane, Features: - 3Gb/6Gb Support SES-2 Enclosure Management Support SAS/SATA Support Six SFF 8087 Connectors Front Panel Buttons: Power on/off Button System Reset Button LEDs: Power LED Hard Drive Activity LED 2x Network Activity LEDs System Overheat LED Power Fail LED System Cooling FAN: 3 x 80mm 7200RPM PWM Fans System Monitoring Chassis Intrusion Switch Operating Environment (System) Operating Temperature Range: 5C - 35C (41F - 95F) Non-Operating Temperature Range: -40 70C (-40 -158F) Humidity Range: 8 90% Non-Condensing Non-Operating Humidity Range: 5 95% Non-Condensing Power Supply 920W high-efficiency (95%+) AC-DC Redundant power supplies with PMBus and I2C AC Input: 100-240 V, 50-60 Hz, 11-4.5 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 Certifications: 80 PLUS PLATINUM Certified Regulatory (Power Supply) USA - UL listed, FCC Canada - CUL listed Germany - TUV Certified Europe/CE Mark EN 60950/IEC 60950-Compliant CCC Certified Form Factor 2U chassis support for max motherboard size - 13" x 13.68", E-ATX and ATX Colors Black Item Dimension (L"xW"xH") 24.8 x 17.2 x 3.5