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Thread: Capacitors in cables to solve coil whine problem

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    Default Capacitors in cables to solve coil whine problem

    Greetings everyone.
    I had problems with my GPU beacuse of coil whine, my 1080 was silent for the first month and one day started to produce this damn noise, I changed it for 1080ti but the problem was still there. So recently I decided to ask help to bequiet!, I use a Dark Power Pro 11 550W, and they sent me a pcie cable extension with what i think are capacitors and the noise became very less noticible. Yet this extension is looking terrible in my build and I would like to put this capacitors in the back of the case by soldering them.
    What i would like to know is how to do this and wich are the best capacitors to put, if this is a problem of the PSU considering that for the first month anything was fine and if my cablemod cables may have made things worst.
    Is this product useful ( https://www.ebay.com/itm/Elfidelity-...-/251894388743 ) ?

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    That product on eBay is crazy whack funky!!! Not sure that thing does anything at all.

    Yeah... Those bigger 4700uF do help with most of the noise. Antec used to put them in their PCIe cables. But I don't think you can get rid of the coil whine altogether.

    I assume you know for a fact that ALL of the whining noise is coming from the graphics card?

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    Want smaller capacitors to deal with high frequency noise as larger capacitors have more inductance; that fancy card includes smaller capacitors.

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    I'm sure that it comes from the GPU.
    Which is the best capacity to put in the cable to reduce the whine and between wich cables soud I solder it?

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    In some circumstances additional caps can solve some Problems.
    But that doesn't have to be the case and depends on the situation...

    Its probably not very helpful in most cases, but it might help reduce the shit coming to the PSU. But nobody really knows as nobody has the equipment who is willing to test that.
    And who has the Equipment has better things to do than to look at how much Caps influence the voltage inside the PC...

    That's something you'd let the Intern do when he has nothing else to do and before having him standing around, you let them do some you'd otherwise wouldn't do...

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    For audible frequencies (up to 20 kHz) I think the Guru is right, a large electrolytic capacitor.

    I would be tempted to locate the coil and put some gunk on it.

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    Quote Originally Posted by ashiekh View Post
    I would be tempted to locate the coil and put some gunk on it.
    That's the easiest fix, for sure.

    There's a reason I keep a tube of this around:

    http://a.co/d/aifPn4N

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    Looks like great stuff, just kinda expensive.

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    I actually have access to my university electronic labratory for this semester and we have a lot of capacitors and many other electronic component free to use. We also have Oscilloscope, DC power supply, signal generator and multimeter all of good quality but I'm still a noob, basicly I only know the circuit theory for ideal circuits, and I'm too shy to ask the professor.


    However I can tell that with the capacitors the situation was better then without now to avoid to solder I bought a cable extension so to put the filter I already own between the cable from the psu and the one to the gpu. Hope it works.
    If it doesn't maybe I will try with an UPS with some filters or a power conditioner.

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    Try to overcome your shyness and approach the Professor.
    Last edited by ashiekh; 12-11-2018 at 04:50 PM.

  11. The Following User Says Thank You to ashiekh For This Useful Post:

    GDILord (12-12-2018)

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