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Thread: What was the first PSU to use a semi passive fan mode?

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    Default What was the first PSU to use a semi passive fan mode?

    I realized that I don't quite remember who was first anymore, and whether it was some big brand or more obscure one. (Like Gigabyte being the first to use USB ports on a PSU, if I recall from some discussions here).

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    Enermax, as far as I remember.

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    Nesteq also was quite early.

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    For fan-off function Seasonic's M12 should have been it, but it did not work. Any speed achieved could not be lowered. The fan control could not make it.
    I don't remember, if Topower was then first with a working version before Seasoonic did the M12 II, which could spin down.
    Enermax did the first variable speed fan and also the manual adjustability and after shut-down cooling.

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    Antec Phantom probably - back in 2005.

    Altough it's more like a fanless unit with a fan - just in case. But that should still count...
    Besides that the NESTEQ units should be one of the first...

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    First fanless was probably the CWT based Antec Phantom.

    First semi-passive (zero-RPM until needed) was probably Seasonic.

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    No, Phantom came after M12, not 2005, and was also not able to spin off I think. Would have to check next week.
    Phantom was first full-bridge phaseshift design, though.

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    Quote Originally Posted by GI_Joe View Post
    No, Phantom came after M12, not 2005
    I've Checked, there are Reviews from 05.
    http://www.silentpcreview.com/article241-page1.html

    And the 500W had a (small) fan inside...

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    Ah, ok, so we were first.. From the review it seems like the fan could spin down.
    M12 was next, but unable to spin down. Only fixed with M12 II.

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    Does having one fan turning off in a dual fan PSU count?

    The now defunct Tagan in 2004 had a PSU with a feature they called, "Tagan Silence Control Technology" in which one of the fans would remain off until a certain temperature point is reached.
    https://www.pcreview.co.uk/articles/tagan-tg480-u01.17/

    And for a completely fanless PSU, we released our ST30NF a month before Antec delivered their Phantom 350. But there was another company that had one for sale that year (2004) ahead of us, couldn't remember who now, but it was a small company that went out of business a year or two after.
    Last edited by SilverStone; 07-30-2017 at 10:50 PM. Reason: Incorrect model name for 300W fanless, was ST30NF, not ST30SF.

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