Corsair CX400W


Corsair's latest product is the CX400W. There is also a new HX450W but we weren't able to get that one in time for our roundup unfortunately. The CX400 is the lowest-end unit from Corsair, which still has enough quality to satisfy even enthusiasts. It comes in black and has a large Corsair logo imprinted in the side panels of the housing. A 120mm Adda fan cools these units. The back is perforated with hexagonal-shaped openings.


The inside reveals a typical Seasonic design with three heatsinks, two for the primary side and the third for the secondary side. Half of the filtering stage is attached to the little sister PCB connected to the other side of the AC jack and then leading onto the main PCB. The primary cap is made by Chemi-Con and the secondary comes from Ostor, a slightly lower end vendor Seasonic uses for these units.

The Corsair CX400W seems to be well equipped with long cable harnesses and plenty of connectors. It is also the only power supply until now with a 4/8-pin 12V connector. It also comes with a 6-pin PEG connector with a length of 60cm (24"). There are six SATA and six Molex connectors as well, which will be good for people with a low-end CPU and GPU but a vast amount of hard drives. The cables are sleeved in black like all Corsair power supplies.

Cooler Master eXtreme Power Plus 390W - Performance Corsair CX400W - Performance
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  • 7Enigma - Wednesday, December 31, 2008 - link

    That is a heck of a lot of work for this article and we appreciate it immensely! Between this article and the upcoming mid-range builders guide (I'm begging...please get it out asap) you have reaffirmed for me this is the #1 site.

    Thanks again.
  • TheDoc9 - Wednesday, December 31, 2008 - link

    The breakdown of the cable connectors and the build quality descriptions were helpful. The power noise charts look useful as well.
  • mino - Monday, January 12, 2009 - link

    Copy that, one of the best PSU roundups around.
  • magreen - Wednesday, December 31, 2008 - link

    We definitely appreciate the roundup. It addresses our needs as consumers. I wish you'd add more info about the Antec Earthwatts 430 though... it's one of the most popular PSUs on the forums here and always shows up for cheap in the hot deals section, often bundled with an Antec case. Wish you'd give us more details on its efficiency, ripple, and your overall take. I don't think you actually said anything about its performance at all. Thanks!
  • OddJensen - Monday, January 5, 2009 - link

    Isn't there a Delta made version of the 430 as well?
  • Christoph Katzer - Monday, January 5, 2009 - link

    Yes which we didn't have.
  • Christoph Katzer - Wednesday, December 31, 2008 - link

    http://www.anandtech.com/casecoolingpsus/showdoc.a...">http://www.anandtech.com/casecoolingpsus/showdoc.a...

    Here's the original review from a year ago. Even though I didn't mention it in the conclusion I think you have a great comparison with the respective graphics towards the end. :)
  • donjuancarlos - Wednesday, December 31, 2008 - link

    Thanks for this article. I am one of those who does modest OCing and no SLI, and this article was pertinent for me.
  • eetnoyer - Wednesday, December 31, 2008 - link

    No temperatures at load? I would think that temps at 100% load for each unit shouldn't be too much. Just as a worst-case thing.

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