Test Setup

As usual we are testing with our Chroma programmable loads to fully load each rail to a specific amount. This is important to get truly accurate results and not merely approximate values. The tests are conducted in two different temperature environments. One is normal room temperature of 25-26°C, while the second environment goes from room temperature and increases steadily up to 50°C. Especially during the higher temperatures we will see how good the power supplies are and what they're really made of. Components inside will perform much worse at higher temperatures, but we expect any good quality PSU to deal with such test conditions without failing.

Note: If you would like to know more about our testing methodology, equipment, and environment, please read our PSU testing overview.

DC Outputs
PSU Load 3.3V 5V 12V Wattage
(All Rails)
10% 1.54A 1.54A 3.83A 60W
30% 3.08A 3.08A 11.49A 180W
50% 7.69A 7.69A 19.15A 297W
80% 12.30A 12.30A 30.64A 470W
100% 15.38A 15.38A 38.30A 584W

To provide a better overview about the different temperatures and input voltages we test we have decided to combine the input voltages into on graph and not four single ones. In the future you will see the area in which the voltages have been measured. We have seen in past reviews that the voltage drops have shown very similar results and with this new graph it will be even better to see in which spectrum the voltage is contributing. The graph will show one big line. The distributed measured voltage has been inside of the specified area.

3.3V DC Output



5.0V DC Output



5.0Vsb DC Output



12V DC Output



The Inside - Transformers Standby Efficiency and PFC
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  • Rebel44 - Monday, September 3, 2007 - link

    When will you test some Seasonic PSUs?
  • USAF1 - Monday, September 3, 2007 - link

    Yeah, I'd love to see the Seasonic S12 Energy+ series tested. Seasonic claims a peak efficiency of 88%.
  • Christoph Katzer - Monday, September 3, 2007 - link

    Will come this week...
  • USAF1 - Monday, September 3, 2007 - link

    Sweet...
  • InternetGeek - Monday, September 3, 2007 - link

    89% efficiency means the PSU doesn't dissipate almost any power at all as heat or whatsoever. This is a legent waiting to happen in terms of PSU ;)
  • Christoph Katzer - Monday, September 3, 2007 - link

    Quite possible. First it was with 230VAC where we have seen already 86% and these 2.7% more is definitly possible. I have seen already 3 years ago efficiency of 89% from a handmade PSU sample at Topower's factory in China.

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