DC Output Stability and Quality








We decided to group all for power supplies into a single chart for each of the voltage rails. All four units have the same topology and the components are about 99% the same, so there were very few differences and it was very easy to combine the results into one chart. The 3.3V rail shows the largest spread between the models, with some of the units coming close to dropping out of spec at maximum load. The 5V rails also drop to the low end of being in spec. The 12V rails on all of the units are decent but not great, showing a total voltage regulation of 5%.






The ripple and noise were surprisingly very small, and we of course tested all of the units. There are minimal visible spikes, so this CWT built power supply at least does well in that regard.

Testing with the Chroma ATE Programmable Load Efficiency and PFC
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  • Slomo4shO - Wednesday, November 19, 2008 - link

    Would it be possible to include CORSAIR CMPSU-400CX, PC Power & Cooling Silencer PPCS420X, OCZ ModXStream Pro OCZ400MXSP, and OCZ ModXStream Pro OCZ500MXSP in your upcoming write-up?
  • Christoph Katzer - Wednesday, November 19, 2008 - link

    Yep, have them already here.
  • Havor - Thursday, November 20, 2008 - link

    Hi Christoph nice review

    But if you really be cool if you would put all the tested PSU's in a database.
    ware you can select a power rating (like say 400~450W) and see on a graf how all the PSUs performs in that W-rating
    http://img03.picoodle.com/img/img03/3/11/20/f_PSUg...">http://img03.picoodle.com/img/img03/3/11/20/f_PSUg...

    A other thing that would be nice would be if you would give all PSU a grade from 0~100 ware 100 would be a PSU perfect PSU <15db/100% eff./DC output perfect flat/temp <30c/PFC = 1/build quality perfect

    And then turn it in a graf. and cross it whit personal most important part for HTPC builders that would be db, for people building a server it would be high % efficacy
  • Mr Perfect - Wednesday, November 19, 2008 - link

    It would be interesting to know what Seasonic is up to these days. Their old S12 line was quite impressive in it's day.

    Oh, and anything that has more then just one 6pin PEG connector. Someone with a reasonably powered system might still want to hook in a 4870 or GTX260, seeing how games are generally GPU limited today.
  • Netcraazzy - Wednesday, November 19, 2008 - link

    I'd love to see a head-to-head comparison between these PSUs and similar units from Antec, OCZ, Seasonic, Sparkle and others. I'm especially interested in the 400w-500w range.
  • Amart - Wednesday, November 19, 2008 - link

    Opinion seconded, well done with the review. I especially appreciate the attention to quality and ripple graphs, as these are of prime concern when recommending a PSU.

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