Final Thoughts and Conclusions

Cooler Master’s new MasterWatt power supplies are an update of their mainstream power supply lineup. All four MasterWatt power supplies feature semi-fanless operation, modular cables, 80 Plus Bronze level efficiency, and come backed with a 5-year warranty. Note: the two MasterWatt Maker 1200W PSUs are 80 Plus Titanium certified and come with a 7-year warranty while the two MasterWatt Lite PSUs are 80 Plus white, have fixed cables and come with a 3-year warranty.

The MasterWatt 550W power supply comes with a standard assortment of semi-modular cables with a combination of sleeved fixed and flat ribbon-style modular cables. The 120mm Cooler Master Silencio fan uses a Loop Dynamic Bearing (LDB) for long life and quiet operation. The power supply also features semi-fanless operation when power output is below 15%. During our tests the MasterWatt power supply delivered good voltage regulation along with good AC ripple suppression. The MasterWatt series comes backed by a 5-year warranty.

The MasterWatt PSUs are currently entering retail channels.

•    MasterWatt 550W: $59.90 USD ( October 2017)

•    550W Continuous DC output at up to 40°C
•    Semi-fanless operation below 15% load
•    80 PLUS Bronze certified
•    Good voltage regulation
•    Good AC ripple and noise suppression
•    Quiet 120mm Loop Dynamic Bearing (LDB) cooling fan
•    Modular cables
•    Safety protections: OPP, OVP, UVP, OCP, OTP and SCP
•    5-Year warranty

•    Teapo caps with 85°C rating

Overall a good basic power supply with minimal frills.

Cooler Master MasterWatt 550W Power Supply

Our thanks to Cooler Master for sending us the MasterWatt PSU to review.


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