Corsair CX450 PSU Review: Two Flavors, Tested and Compared

Cross-Load Tests & Infrared Images

Our cross-load tests are described in detail here.

To generate the following charts, we set our loaders to auto mode through our custom-made software before trying more than 25,000 possible load combinations with the +12V, 5V and 3.3V rails. The load regulation deviations in each of the charts below were calculated by taking the nominal values of the rails (12V, 5V and 3.3V) as point zero. The ambient temperature was between at 30°C (86°F) and 32°C (89.6°F).

Load Regulation Charts (CX450 - Great Wall)

Efficiency Chart (CX450 - Great Wall)

Efficiency Chart (CX450 - CWT)

Ripple Charts (CX450 - Great Wall)

Infrared Images

We applied half-load for 10 minutes with the PSU's top cover and cooling fan removed before taking photos with our modified FLIR E4 camera, which delivers 320 x 240 IR resolution (76,800 pixels).

CX450 - Great Wall

The Great Wall unit's minor rails heated up more than CWT's implementation. That's probably why it's armed with a more aggressive fan profile.

CX450 - Channel Well Technology

We measured normal temperatures inside of the CWT-manufactured CX450, given the operating conditions.

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6 comments
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  • jpe1701
    Oh thank you Aris, I've been waiting for a review of this. It's always low in price and tempting to recommend but there weren't any reviews.
  • Darkbreeze
    Why do both of the review summary boxes list the Great Wall version? Both the one on the front page and the last page are the same. Seems like you ought to include a summary box for both versions since there seems to be some major differences between them. And even more so since you seem to indicate the CWT version is the better unit, but only include a summary box for the Great Wall unit.
  • crmaris
    This was not my choice. Initially the review had both summary boxes.
  • Darkbreeze
    I totally understand. No worries mate. Editorial has a bad habit of effectively pooping all over the independent contributors writing as well. Not surprising that they are doing so with your work, but I sure wish somebody in editorial would make a few changes to policy that keeps the finished product a bit more in line with what the contributor intended, which often they don't. In this case, it totally makes zero sense that they didn't leave it as you had it.
  • Rexper
    Quote:
    We preferred CWT's version of Corsair's CX450, but that doesn't mean you should avoid Great Wall's

    Not that we have a choice.
    Great article, once again, Aris!

    There is some controversy appearing relating to the fan bearings used in the CX450. JonnyGURU, who works at Corsair, claims both CX450 versions use a rifle bearing.
    Unfortunately, we can't know for certain until someone dismantles the fan.
    http://www.jonnyguru.com/forums/showthread.php?t=15943&page=2
  • Darkbreeze
    I don't think it even makes a tremendous amount of difference. Fan failure on power supplies due to bearing fatigue is the least of the issues I've usually seen in the past on older units. Plus, it's not terribly difficult to replace a PSU fan if you have at least of a modicum of common sense and don't possess four thumbs.

    If fan noise is the biggest worry, or bearing failure over the long term, then I'd say these are winners for the price point. Most would never hear them over the sound of the rest of the system in any case.