The MasterWatt is an 80 Plus Bronze power supply with an innovative semi-fanless mode. Under 15% load, the MasterWatt fan remains idle,offering zero dBA. When demand for power increases,a gradual fan curve provides measured cooling with little to no noise at any output level. Dual forward / DC-to-DC topology is employed to keep the voltage stable in all conditions. For increased performance,MasterWatt is equipped with 16 AWG power cables,which reduces resistance, thereby increasing efficiency.
80 PLUS Bronze Certified The 80 PLUS Bronze certification guarantees that MasterWatt delivers an average efficiency of 85%.
Durable LDB Bearing Sealant on the bobbin and featuring the highest dustproof level IP6X Sealant on the The groove outside of the bearing helps to circulate the oil Recycle slot adds extra storage space for the oil The shaft makes the oil flow by pumping it while spinning Cooler Master 120mm Silencio FP fan combines sealed LDB bearings with quiet fan blades offering a long lifetime of quiet cooling.
Semi-Fanless up to 15% load MasterWatt Operates at 0dB under 15% load. Experience noise-free basic computing.
Product Name MasterWatt 550 Product Number MPX-5501-AMAAB ATX Version ATX 12V V2.4 PFC Active PFC Operation Voltage 100-240 Vac Input Voltage 100-240 Vac Input Current 8-4 A Input Frequency 50-60 Hz Dimensions (LxBxH) 140 x 150 x 86 mm Fan Size 120 mm Fan Bearing LDB Power Good Signal 100-500 ms 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 OCP / OVP / UVP / OPP / OTP / SCP Regulatory CCC, CE, TUV-RH, RCM, EAC, cTUVus, FCC, BSMI, KC, CB Connectors MB 24 Pin 1 CPU 12V 4+4 Pin 1 SATA 6 Peripheral 4 Pin 2 FDD Cable 4 Pin 1 PCI-e 6+2 Pin 2