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Stress Test: Power Supplies Under Full Load

Data Collection And Live Upload

All data is collected by data server PC

Takes over the management of electronic loads, live cameras and audio recording : Powerful computer systems

This computer transmits the video data and measurement data live via FTP upload to the THG website.Prices And General Overview Of Tested Products

Since the first power supply test three years ago - Inadequate and Deceptive Product Labeling : Comparison of 21 Power Supplies - many things have changed. The power supplies have become more colorful and more complicated, equipped with many functions such as displays and standby outputs. Power supplies are still high-profit items, because they are relatively inexpensive to manufacture and sell for high prices. Previous tests have shown that the efficiency under partial load for power supplies fluctuates between 55 and 75 percent - depending on the model and on the power class.

The power range here extends from 300 watts up to an amazing 850 watts, and the corresponding price range is from about $95 to $500. Both voltage transformers that are actively cooled (using fans) and passively cooled (without fans) will be used.

Originally we planned to bring two more power supplies on board as re-test, but to date, manufacturers Cooler Master and Hiper have not sent their replacement samples. We offered them to test them offline - just in case the devices in question arrive.

Manufacturer & ModelTest PassedPower RatingPriceNoise LevelWarrantyEfficiency
AcBel ATX-550CA-AB8FMno550 watts$14061.1 dB(A)10 years76.8%
Antec Phantomyes500 watts$19054.0 dB(A)3 years83.4%
Antec True Power 2.0 550 wattsyes550 watts$12060.0 dB(A)3 years73.8%
Aopen Prima Power 700yes700 watts$20062.0 dB(A)3 years84.0%
Be Quiet BQT B5-520W S1.3no520 watts$130-3 years-
Cooler Master Real Powerno550 watts$130-2 years-
Enermax Coolergiant EG485AX-VHB (W)yes480 watts$12061.8 dB(A)3 years77.2%
Enermax Noisetaker EG701AX-VE(W)yes600 watts$15058.6 dB(A)3 years80.2%
Epower Silent Engine Xscale 470yes470 watts$10065.0 dB(A)2 years75.5%
Fortron FSP300-60GNFyes300 watts$950.0 dB(A)3 years83.5%
HEC AcePower ACE580UBno580 watts$140-2 years-
Hiper Type R580no580 watts$130-2 years-
Jeantech Arctic JN120F-600AP12V2yes600 watts$19060.0 dB(A)2 years80.0%
OCZ Powerstream 600no600 watts$200-3 years-
PC Power & Cooling Turbo-Cool 510yes510 watts$20072.0 dB(A)5 years78.0%
PC Power & Cooling Turbo-Cool 850 SSIyes850 watts$50068.3 dB(A)5 years80.4%
Seasonic S12yes600 watts$14059.0 dB(A)3 years83.4%
Silverstone ST65ZFyes650 watts$15068.0 dB(A)3 years75.4%
Spire SP-500Wyes500 watts$11564.1 dB(A)2 years81.0%
  • atis
    Where's the end of article? There are actual test results missing for 7 PSU's.