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Thread: MWE V2 WHITE rattling noise after booting?

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    Default MWE V2 WHITE rattling noise after booting?

    Many local users are complain about rattling noise continuing 10~15 mins after boot.
    First I ignored that was a normal failure but so many are complaining about it.
    Someone got a replace new box but it was defect again.

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    Sucks. Everyone hates RMAing an item, just to have it replaced with one that has the same issue.

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    Yeah so accordingly that guy just threw away it.

    Guess Aris handled those units(Because they are cybenetics certed)... Did it had same problem in the lab too?

    I heard hong hua fans(used in 600W+ MWE) make noise around 600rpm, maybe thats the reason? I've never heard what it sounds like but...

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    I have one . MWE 700 v2 white. and very loud noise like inductor vibrating

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    Quote Originally Posted by asf14tomcat View Post
    I have one . MWE 700 v2 white. and very loud noise like inductor vibrating
    Is it the fan or the inductor? Others say that the sound disappears 10~15min after boot, is this the case with yours?

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    Quote Originally Posted by rgbodosk View Post
    Yeah so accordingly that guy just threw away it.

    Guess Aris handled those units(Because they are cybenetics certed)... Did it had same problem in the lab too?

    I heard hong hua fans(used in 600W+ MWE) make noise around 600rpm, maybe thats the reason? I've never heard what it sounds like but...
    Interesting.

    So the MWE V2 uses the HA1225H12F-Z. It's the high RPM version (2200 RPM) of the fan Seasonic uses in Prime, including the AX850 and AX1000. Bearing can be either rifle or FDB. That detail is not exposed by HH's part numbers.

    Specifically, Seasonic uses the HA1225L12F-Z. This is the 1600 RPM version of that fan.

    There's also a HA1225M12F-Z that is 1800 RPM.

    Keep in mind how fan motor windings work in a DC fan: You need more windings to hit those higher RPMs. But that means you need more current to get the fan spinning from full stop. So your higher RPM fans tend to also have higher start up speeds.

    If they're not using a quality fan driver IC and trying to spin the fan at a lower RPM then what Hong Hua designed it for, then the motor in the fan is going to make all sorts of grinding and buzzing noises.

  7. The Following 2 Users Say Thank You to Jon Gerow For This Useful Post:

    rgbodosk (10-29-2019), vvvpcf (01-17-2020)

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    Quote Originally Posted by rgbodosk View Post
    Is it the fan or the inductor? Others say that the sound disappears 10~15min after boot, is this the case with yours?
    You and I replied at the same time.

    I'm sure it could be the fan MOTOR, which is essentially an inductor inside the fan. So a fan can have "coil whine" eg. "inductor noise" while the fan itself is properly balanced, etc.

    I blame the OEM's inexperience with creating a proper fan controller.

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    Worst case - global recall?

    My guess - fan spins at very low rpm after boot, and the psu heats up after 10~15min -> rpm increases and noise gone.

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    Quote Originally Posted by rgbodosk View Post
    Worst case - global recall?

    My guess - fan spins at very low rpm after boot, and the psu heats up after 10~15min -> rpm increases and noise gone.
    Precisely.

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    Do you know the starting rpm for the HA1225H12F-Z model?



    + Hong Hua motor noise
    Last edited by rgbodosk; 10-30-2019 at 12:18 AM.

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