HELIOS M1-550B Features: 550W 80 Plus Bronze Deliver up to 85% Efficiency High Quality Capacitors Provide Superb Performance and Reliability Black Flat Cables 1 x (4+4P) EPS Compatible with ATX12V v2.4 Support C6/C7 Power State Automatic Fan Speed Optimization APFC with PF Value of 0.99 Heavy-duty Protection: OVP/UVP/OPP/SCP/OCP Specifications: Type ATX12V v2.4 Efficiency Meet 80 PLUS Bronze efficiency Power Factor Correction APFC with PF value of 0.99 Support MB Sync No Dimension (L x W x H) 140 x 150 x 86 mm Support C6/C7 power state Yes AC Input 100-240V / 4-8A / 47-63Hz DC Output +3.3V / +5V / +12V / -12V / +5Vsb Max. Output Current 18A / 13A / 42A / 0.3A / 2.5A Max. Output Power 100W / 504W / 3.6W / 12.5W Total Power 550W Protection OVP / UVP / OPP / OCP / SCP Main Power 1 (20+4 Pin) CPU 1 (4+4 Pin) PCI-E 2 (6+2 Pin) SATA 5 (5 Pin) Molex 3 (4 Pin) Modular Non Modular Flat Cable Yes Cooling System 120mm hydraulic bearing fan Silent Mode No