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Thread: Double fans

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    Default Double fans

    Are there any PC power supplies with double fans?

    The idea being that if one fails the other is still going; better still if the supply puts up a light when one fan fails.
    Last edited by ashiekh; 06-09-2018 at 07:00 PM.

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    Poor marketing. Redundancy on consumer products implies that failure is inevitable.

    In all seriousness... PCB layout is typically optimized for airflow. Dual fans, with one fan running while the other does not, will cool one side better than the other.

    Best to just have the PSU shut down with OTP, though an audible alarm prior (so the user can save before OTP shuts the system down) would be ideal.

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    You are right, I just have funny ideas now and again.

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    Generally dual fans can be good, especially when positioned at the exhaust side of the PSU.
    But that limits you to 80mm fans and thus they noise goes up significantly.
    Enermax also used to have such designs in the past.
    For the noise reason that design does not exist in the consumer market any more.
    Server market is another matter though.
    Or special PSU's like this:
    https://www.youtube.com/watch?v=SdFB...ature=youtu.be
    "The one who says it cannot be done should never interrupt the one who is doing it."

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    Default

    Quote Originally Posted by ashiekh View Post
    Are there any PC power supplies with double fans?
    Yes, I have Thermaltake TT-500PL5NH with two 80mm fans. It is not as quiet as some modern PSUs with 120mm fans.

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    Quote Originally Posted by jonnyGURU View Post
    Best to just have the PSU shut down with OTP
    Would it kill manufacturers to control fan RPM instead of waiting for overheat happens?

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    Default

    Antec Smartpower 2.0 had two 80mm fans, an intake and an exhaust. Normally (<150W) the exhaust fan didn't run. It never ran for the 10 years I used it!

    I never thought of it as "fan redundancy" (and it wasn't marketed that way), but I suppose it was.
    Attached Images Attached Images

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    Quote Originally Posted by omgfire View Post
    Would it kill manufacturers to control fan RPM instead of waiting for overheat happens?
    They already do.

    As for tandem fans -- one at intake, one at exhaust -- a few have reached the market, but never caught on.
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    I recall seeing dual (push-pull) fans in the infamous

    https://youtu.be/JP8nFQYQW34

    although it didn't seem to help the unit there.

    Thanks again to everyone helping identify the music as Scheming Weasel; I was so convinced it was something old and French.

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    Default

    Quote Originally Posted by ehume View Post
    They already do.

    As for tandem fans -- one at intake, one at exhaust -- a few have reached the market, but never caught on.
    No, they were rather common ~15 Years ago on higher end units.
    Almost everyone had them, most Topower, Enermax, HEC/Compucase.

    Though Enermax mostly used top/back fan like they do on the newer Revolution Duo. That was the norm at the time...

    But around 2006 or so, most of them were gone and replaced with 120mm or even 140mm fans and designs for this...

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