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Tuniq Potency 550W Review


Closer Look:


The Tuniq Potency 550W is your basic black, no thrills, power supply. First impressions are good; the build quality seems excellent, and is of non-modular design. Cooling is taken care of by a large 120mm cooling fan covered by - you've guessed it - a black grill.













One side of the unit sports the usual specification label, with all the information you are likely to need on power distribution limits. This is the only label on the case, except for four tiny stickers on the opposite side. You may very well see these on other power supplies, so I will give you a very brief explanation as to what they mean.

RoHS - Stands for "The restriction of use of certain hazardous substances in electrical and electronic equipment." If equipment is non-compliant, it cannot be sold in the European Union. The RoHS standard bans the placement of products onto the EU market containing more than agreed levels of lead, cadmium, and mercury, to name but a few.

ATE OK - The equipment has undergone testing on automatic test equipment. Usually in the form of a computer-controlled test bed, which runs a series of tests on the board, and ensures the correct responses are given.

HI-POT OK - A high voltage, or high potential, over and above the normal input voltage - typically 500VAC - 1500VAC - is applied between live and neutral connected together, and the case (ground), to ensure no path exists for current to flow, and hence no electric shock given.

BURN IN OK - The unit is run at a set load for a set period of time, based on the statistical fact that any new product is most likely to fail early in its life.

Note the inclusion of a mains On/Off switch, which is always welcome.




The photograph below shows the 120mm 12VDC 0.18A sleeve bearing fan by Globe, complete with a clear plastic baffle that I will mention again later. The printed circuit board is laid out well, allowing good airflow throughout the area. The two aluminum heatsinks are smaller than I expected, so perhaps this unit doesn't generate quite as much heat as one would expect. I could not find any markings on the printed circuit board that would indicate it had been built by a third party manufacturer. The manufacturer of the electrolytic capacitors also escaped me, as I was unable to find any brand or recognisable manufacturer's mark.




The last two photographs show the cables leaving the power supply, and a view of the mains input filtering components. The two single yellow wires on the left hand side are the 12V2 rail, which is exclusively used on the PCI Express graphic card connector.



  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specifications & Features
  4. Testing: Load Testing 110VAC, 230VAC
  5. Testing: Efficiency and Power Factor
  6. Testing: Temperature, Noise Levels, and Fan Speeds
  7. Conclusion
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