Cooler Master MasterWatt 550W Power Supply Review
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 (newegg.com 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.