PRODUCT NAME MasterWatt 550 MODULAR Semi Modular ATX VERSION ATX 12V v2.4 PFC Active PFC OPERATION VOLTAGE 100-240Vac INPUT VOLTAGE 100-240Vac INPUT CURRENT 8-4A INPUT FREQUENCY 50-60Hz DIMENSIONS (L X W X H) 140 x 150 x 86 mm FAN SIZE 120mm FAN BEARING LDB POWER GOOD SIGNAL 100-500ms HOLD UP TIME 16ms at 80% Load EFFICIENCY 85% @ Typical Load ERP 2013 LOT 6 Yes MTBF >100,000 Hours OPERATING TEMPERATURE 0-40°C PROTECTIONS OPP, OVP, UVP, OCP, OTP, SCP REGULATORY CCC, CE, TUV-RH, RCM, EAC, cTUVus, FCC, BSMI, KC, CB MB 20+4 PIN CONNECTORS 1 CPU 12V 4+4 PIN CONNECTORS 1 SATA CONNECTORS 6 PERIPHERAL 4-PIN CONNECTORS 2 FDD CABLE 4-PIN CONNECTORS 1 PCI-E 6+2 PIN CONNECTORS 2 80 PLUS Bronze WATTAGE 500 to 750W SERIE MasterWatt Series