Cooler Master MasterWatt PX-5501-AMAAB ATX12V/EPS12V Modular Power Supply - 550 W

  • Part: 1144670
  • Model: MPX-5501-AMAAB-AU


Out of Stock

Cooler Master MasterWatt 550 Semi-Modular PSU



Semi-fanless Modular 80 PLUS Bronze Certified Power Supply

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

Cooler Master 120mm Silencio FP fan combines sealed LDB bearings with quiet fan blades offering a long lifetime of quiet cooling.

  • A: Sealant on the The groove outside of the bearing helps to circulate the oil
  • B: Sealant on the bobbin and featuring the highest dustproof level IP6X
  • C: Recycle slot adds extra storage space for the oil
  • D: The shaft makes the oil flow by pumping it while spinning

Semi-Fanless up to 15% load

MasterWatt Operates at 0dB under 15% load. Experience noise-free basic computing.





Dual Forward and DC-to-DC Circuit DesignMore Conductive PCI-e Cables

The Dual Forward and DC-to-DC circuit design offers reliability and stability. This is especially significant in +3.3V and +5V outputs.






More Conductive PCI-e Cables

The MasterWatt uses 16AWG cables for PCI-e cables. Less resistance and better efficiency,providing you a safer user environment.

Product Type:Power Supply
Input Voltage:120 V AC
230 V AC
Output Power:550 W
Output Voltage:12 V DC
3.3 V DC
5 V DC
Form Factor:Internal
Brand Name:Cooler Master
The number of +12V Rails:1
Product Family:MasterWatt
Specification Compliance:ATX12V/EPS12V

General Information
Product Type:Power Supply
Manufacturer Part Number:MPX-5501-AMAAB-AU
Manufacturer Website Address:
Manufacturer:Cooler Master Co., Ltd
Product Model:PX-5501-AMAAB
Product Name:MasterWatt 550 Semi-Fanless Modular 80 PLUS Bronze Certified Power Supply
Product Line:MasterWatt
Brand Name:Cooler Master

Environmentally Friendly:Yes
Environmental Certification:Green Dot
TÜV Rheinland
China RoHS
ErP Lot 6
80 Plus Bronze

Physical Characteristics
Form Factor:Internal
Height:86 mm
Width:140 mm
Depth:150 mm

Power Description
Input Voltage:120 V AC
230 V AC
Output Power:550 W
Output Voltage:- 12 V DC @ 300 mA
12 V DC @ 45.80 A
5 V DC @ 20 A
5 V DC @ 3 A
3.3 V DC @ 20 A
The number of +12V Rails:1

Technical Information
Number of Fans:1
Specification Compliance:ATX12V/EPS12V

Limited Warranty:5 Year