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Thread: Q: Coil whine, PSu dying, maybe new fan direction?

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    Default Q: Coil whine, PSu dying, maybe new fan direction?

    TLDNR: I have issues with coil whine (no dust issue). Should I change the direction of airflow on a PSU w/80mm rear fan from blow to suck? Specifically the Etasis ET750 PSU, which came from factory exhausting inner case-air OUT.
    Due to issues with PSU, I am thinking of permanently changing the air-flow from blow to suck.
    Or is the coil whine (and occasional screen lags) just saying this PSU is dying?

    Background:
    I have had the PSU for ~4 years. (Newegg DOTD).
    Never used for gaming (though attached to an EVGA 260GT which requires two 2x3pin). However for such a sizable PSU, it never was that good.
    Only now realizing that the PSU was the likely cause for screen lags & freeze-ups when editing a raw image file (22mb) in PShop.

    Recently, I have been getting more noise from the case than normal. I mistakenly assumed it was the GFX card fan. No. It was coming from the PSU.
    Anyway after removing the PSU (PITA), I determined the sound was not the fan but likely coil whine (sounds like a HD "seeking" or static) under gentle increases in PC/CPU demands. (opening up a few browsers, etc) System is an QCore E6900 w/8Gb of ram)

    What I did:
    I removed PSU fan and gave it a drop of oil and reinstalled in the SUCK orientation - drawing outside air INTO the case. (I have a Antec P180 case that has a separate chamber for the PSU and HDs). I am going to switch the direction of the 120mm HD fan TOWARDS the HD's. (previously the HD fan was exhausting towards the PSU. The two 2TB HDs do NOT run hot)

    Results:
    The result was less coil whine and much less frequent screen lags, however this is without the PSU installed. (it's just on top of case).

    Question: Should I just replace the PSU or does it have a future? (I was thinking of replacing the 80mm fan, though it's a 2prong)

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    Default

    Quote Originally Posted by TwoWheels View Post
    TLDNR: I have issues with coil whine (no dust issue). Should I change the direction of airflow on a PSU w/80mm rear fan from blow to suck? Specifically the Etasis ET750 PSU, which came from factory exhausting inner case-air OUT.
    Absolutely N O T!
    There's a reason that the fan is blowing and not sucking!

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    Update: As a 48hr test, I have been running the PSU FAN in the opposite direction of factory design. (testing OUTSIDE the case to remove one variable - internal case temperature. Thus cooler ambient air is being drawn into PSU regardless of direction)
    Result: Significant reduction in coil whine, screen lag and elimination of the previously frequent "display drivers has stopped working and has recovered" glitch.
    I then returned to original direction - exhausting OUT OF CASE (on a PSU with a 80mm rear mounted fan). The coil whine is constant and the "display driver has stopped working" issues have returned.

    I am very tempted to return to the "opposite" direction from factory spec. I originally agreed w/Stefan, the OEM would best know how to design air flow to cool the PSU. However it now seems they (Etasis - mfr of Silverstone PSUs) made a compromise with venting direction - drawing the internal WARMER case-air OUT for the overall benefit of the system. However with MY case (Antec P180), I can keep the PSU in it's own chamber and not have it affect case temps.
    ---
    Thx. I have to eventually find another PSU.
    Last edited by TwoWheels; 01-31-2014 at 07:30 PM. Reason: Update-Tested fan in both directions

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    Bump and also a question, is this PSU dying?
    Also read an informative article in the sticky that applies. This Etasis PSU was designed by a company who mainly mfr'd powerful units for servers. The rails and setup is different.

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    Last time I tried swapping PSU fan direction, I ended up with a scorching hot computer case. Suffice to say, I never tried that again.... Of course, this was an AOpen HX08 case, which didn't have the best airflow. (But was built like a tank).

    Rig 1: Core i5 6600K - Asus Z170 Pro Gaming - Corsair Vengeance 16GB PC2666 RAM - MSI GeForce GTX1070 - Samsung EVO 850 500GB SSD + 2TB Seagate SSHD - Corsair RM550x - Fractal Design R5 - Win10 64

    Rig 2: Ryzen 1700X @ 3.9 GHz - Gigabyte X370 Gaming 5 - Corsair LPX 16GB PC3200 RAM - Gigabyte GeForce 1070 - 250GB Samsung EVO 850 SSD - Corsair RM650i - Win10 64
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    If you have whining noises that correspond with errors, glitches, etc. which would lead me to believe there are some voltages that are horribly off or possibly out of control ripple in your power, I would certainly say "yes... this PSU is dying."

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