Component Analysis

Before reading this page, we strongly suggest looking at this article, which will help you better understand the insides of a PSU.



This is precisely the same platform as the SilverStone Hela 2050. There's no difference in parts. Cooler Master decided to lower the PSU's capacity by 50 W to avoid going head-to-head with SilverStone. A 50 W decrease might look low, but can offer a notable difference in overall performance since we are talking about four-digit instead of three-digit watt numbers.


The heatsinks are not large, and there is ample space on the PCB's right side. The APFC circuit is interleaved, and since there is no room for a single, huge main transformer, two smaller ones are installed instead. Build quality is high, and quality parts are used.


The transient/EMI filter stages have all the necessary parts and sufficiently suppress EMI emissions.


Two metal oxide varistors (MOV) handle voltage surges.


An NTC thermistor suppresses large inrush currents. A bypass relay supports the latter.


The bridge rectifiers are bolted to a pretty large heatsink.


The APFC converter uses two Oriental Semiconductor FETs and two powerful CREE boost diodes. An interleaved design is used, where two APFC converters operate in parallel with a phase difference among them. This minimizes input and output current ripple, lowers conduction losses, offers higher efficiency, and doubles the effective switching frequency.


The bulk caps are by Nippon Chemi-Con and have a combined capacity of 2040uF.


The APFC controller is an ATK AT6201ZSPF.


The four main switching FETs are installed in a full-bridge topology, and an LLC resonant converter is used for higher efficiency. The resonant controller is an ATK AT6301ZTSF.


The LLC resonant controller is a Champion CM6901T6X.


There wasn't enough space for a large main transformer, so two smaller ones were installed in parallel.


The +12 V board is as close as possible to the main transformers, which minimizes energy losses.


The electrolytic filtering caps are of high quality, and lots of Unicon polymer caps are also used.


Two DC-DC converters generate the minor rails.


This is the board responsible for the 5VSB rail's regulation.


The standby PWM controller is an ATK AT6002H.


The supervisor IC is a Weltrend WT7527RA.


Twelve polymer caps at the face of the modular panel form an extra ripple-filtering layer.


Soldering quality is good.


The cooling fan is by Globe Fan, and its model number is RL4Z B1352512EH-3M. It uses double ball-bearings, which are tolerant to heat. The fan controller is an ATK AT1051ZSP8.