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Cooler Master Masterwatt 550 80 Plus Bronze Semi-Fanless Modular Power Supply

Cooler Master MPX-5501-AMAAB-US

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MasterWatt Model MPX-5501-AMAAB

Manufacturer Part#  MPX-5501-AMAAB-US

Provantage Code:  COOL0T1

Condition:  Factory New

  • Product Type: Power Supply
  • Output Power: 550 W
  • Limited Warranty: 5 Year
  • Form Factor: Internal
  • Product Family: MasterWatt

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Cooler Master MPX-5501-AMAAB-US Specifications

    Masterwatt 550 80 Plus Bronze Semi-Fanless Modular 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,MasterWa tt 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.

    • Sealant on the The groove outside of the bearing helps to circulate the oil
    • Sealant on the bobbin and featuring the highest dustproof level IP6X
    • Recycle slot adds extra storage space for the oil
    • 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 Design

    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.

Environmental Certification

    80 Plus Bronze  –  ErP Lot 6  –  TÜV Rheinland  –  cTUVus  –  WEEE  –  China RoHS  –  RoHS  –  Green Dot

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General Information
Product NameMasterwatt 550 80 Plus Bronze Semi-Fanless Modular Power Supply
Manufacturer Part NumberMPX-5501-AMAAB-US
Product LineMasterWatt
Product ModelMPX-5501-AMAAB
Product TypePower Supply
Technical Information
Number of Fans1
Power Description
Input Voltage120 V AC

230 V AC

Number of +12V Rails1
Output Voltage3.3 V DC @ 20 A

5 V DC @ 20 A

12 V DC @ 45.80 A

- 12 V DC @ 300 mA

5 V DC @ 3 A

Output Power550 W
Physical Characteristics
Form FactorInternal
Limited Warranty5 Year
Environmentally FriendlyYes
Other Information
Product FamilyMasterWatt
Specification ComplianceATX12V/EPS12V
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Cooler Master MasterWatt Model MPX-5501-AMAAB MPX-5501-AMAAB-US