Cooler Master V Series 550W PSU Review

1. Introduction2. Cooler Master V Series 550W (Bundle & Cables)3. Cooler Master V Series 550W (External)4. Cooler Master V Series 550W (Internal)5. High Res Gallery6. Testing Methdology and Results7. Closing Thoughts8. View All Pages

Cooler Master are using a 120mm fan (A12025-25RB-2IN-F1). This Chinese fan is rated 12V 0.16A and we know the 15RB in the same series is actually a tuned Delta rebrand. This new 25RB fan is rated to produce 52CFM airflow at a maximum speed of 2,500 rpm. Noise levels are officially rated to 29.7dBa. It uses an LDB bearing.



This is an Enhance OEM design, a company Cooler Master have a long standing relationship with – even if they like to keep it quiet. Their previous, high capacity V series power supplies were actually Seasonic KM3 modified designs. This one is LLC + DC-DC topology and we can see the daughtercards in place for generation of the +3.3V and +5V rails.


Soldering quality is high throughout and the design offers full OVP/UVP/OPP/OTP/SCP protection. The primary capacitor is a high grade Japanese 105C KMR model from Nippon Chemi Con – rated 450V 390uF. Secondary capacitors are also Japanese branded, which is reassuring.

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