Is coil whine an issue with every XPS 15 9550 unit?

Discussion in 'Dell XPS and Studio XPS' started by einsteinchen, Sep 20, 2016.

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Can you hear coil whine from your XPS 15 9550

  1. Yes, while connected to the PSU and on battery

    10 vote(s)
    50.0%
  2. Yes, only while connected to the PSU

    1 vote(s)
    5.0%
  3. Yes, only on battery

    0 vote(s)
    0.0%
  4. No

    9 vote(s)
    45.0%
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  1. einsteinchen

    einsteinchen Notebook Geek

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    Hi all,
    I am aware that we have a thread dealing with hardware and software problems in general. Since I would like to make a poll for the coil whine issue, opening a new thread for this seemed to be a good idea.

    Why am I asking 'Is coil whine an issue with XPS 15 9550 unit'? I have the second board in my XPS 15. The first board had a relative low coil whine, which was more like a crunching noise. I was kind of fine with that, but due to heat issues it was replaced. The second board has now a high pitches coil whine, which is audible to me and really annoying. Discussing this issue with Dell Germany, the support told me, that every system has coil whine issues.

    My question to you, owners of Dell XPS 15 9550 notebooks, is: is that true? Since I am aware, that not all people can hear high pitched noises (due to age, loud work environments or other factors), I reformulated my question to 'Can you hear coil whine from your XPS 15 9550'.

    PS: According to a posting here in the forum, a bad power supply could cause coil whine. I got two power supplys and with both of them the problem persists.
     
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  2. secondvision

    secondvision Notebook Enthusiast

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    My system (i7) suffers from coil whine while on battery. It might also be while it's charging but I can't hear the whine over the fans then.
    A 'fix' is to disable the Intel Graphics software. You won't notice any coil whine but it decreases the usability of the system so much that it wasn't worth it for me.
     
  3. salada2k

    salada2k Notebook Consultant

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    I have problems with things around me whining all the time, but I dont think it's the coil in my 9550.
     
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  4. jackal24

    jackal24 Notebook Enthusiast

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    I've got pretty good whine on my couple year old XPS 13 (when plugged in), but none on my 9550.
     
  5. CHJC

    CHJC Notebook Enthusiast

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    Mine has, and really bad. Especially with the Nvidia card running.

    https://drive.google.com/open?id=0B8feeezwJVaLUnVxRm1Vc1Q0Y2s

    0:00 AC in, Win Error Sound
    0:23 Opened Unigine Heaven;
    0:51 Fans Start;
    1:30 Pull Plug;
    2:00 Shutdown UH;
    3:28 Plug In

    It's very pretty noticeable the whole time, although on battery idling was quieter than the fan.
     
  6. GoNz0

    GoNz0 Notebook Prophet

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    I have tinnitus so buggered if I know.

    OK so a little if the fans are off and the rooms silent but you can't stop it, it depends how bad each one is.

    I wouldn't warranty repair one that can't be heard over fans on quiet from my engineers perspective.
     
  7. einsteinchen

    einsteinchen Notebook Geek

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    I also would not aks for a replacement if the fan could drown out coil whine. But I can hear it while the fans (at least for the lower fan speeds).
    From your engineers perspective, could you elaborate why so many units (maybe all) are affected by coil whine? Could this be avoided by Dell if they would have used better quality components? I had an Alineware 15 R2 for 6 months with the same i7 6700hq CPU and never experienced any coil whine.
    Could you tell us what you used to the noise? I tried to place my iPhone directly on the notebook, but could not record any whining. But what you recorded is really bad. Rattling noises combined with high pitched ones :(
     
  8. GoNz0

    GoNz0 Notebook Prophet

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    These things don't have any insulation as they are all about cutting edge performance, size and weight. Those alienwares are well cooled and better insulated. Yeah they could use bigger and better parts but then it is a heavy laptop and wouldn't sell.
     
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  9. einsteinchen

    einsteinchen Notebook Geek

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    The Dell support guy told me today, that they have a new(ish) revision of the board, which supposedly reduces coil whine. I will see next week when they replace it again, if that helps.
    So this is a problem with all slim and light notebooks? I have no experience with MacBoos or for example the Razer notebooks, but a short google search showed more issues with Dell XPS notebooks then the other two brands.

    Regarding the charger: in the Dell forum specific PSUs were identified for causing coil whine. One of my PSUs it a defective one, tomorrow I will check if the other one I got also belongs to this group.
     
  10. GoNz0

    GoNz0 Notebook Prophet

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    Toshiba ultrabooks used to have it (Don't know about curent as I don't fix them now)
    Every laptop will have it, it all depends how close you have to get to hear it, even SSD's make noise, you should hear my 950 pro when it is under load, it has a chattering screech that you can hear when it is exposed.

    Young people hear it more as they can hear higher pitch noises, us old farts lose the ability as we age.
     
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