po7-655 Weird noise form PC under load, it might be AIO issues?

Yalador
Yalador Member Posts: 4 New User
edited 5:31AM in Predator Desktops

I have had a weird noise coming from my pc recently, and its only when my pc is under load, at first i was like "alright its probably normal" but im not so sure cause it sounds like someone is using a buzz-saw from a distance! I have tried pinpointing the sound and it only happens when my cpu fans increases in speed (tried with predator sense) so i might be my AIO having issues?

[Edited the thread to add issue detail to the title]

[Edited the thread to add model name to the title]

Answers

  • GotBanned
    GotBanned Member Posts: 637 Seasoned Specialist WiFi Icon

    Morning!

    What is the model of your PC? What CPU and GPU do you have?

    Are you sure that there's nothing hitting any of the fans, a cable or something like that? Do the fans spin easily when you manually flick them with your finger (a bearing might be shot)?

    Is it possible that the sound comes from the water pump? There might be air bubbles in the loop, or its bearing might have a problem.

    How are the temps, fan and pump speeds when the PC is under stress?

  • Axxo
    Axxo Member, Ally Posts: 540

    This is called "Coil Whine" that comes from the inductor on the motherboard or graphics card, or in the power supply. An inductor is a passive electronic component that is capable of storing electrical energy in the form of magnetic energy.
    When the vibrating frequency goes up to the range that the human ear can hear, that causes the sound reported.

    As for how to fix this, there's no definite way, but there are some methods we can try to improve this:

    Replace the modular power cable on the power supply unit if using modular cable.
    This is because some of the cable come with the power supply that will have a capacitor on it, and some do not. Capacitors is a good factor for current stability which could solve the coil whine issue in some cases.
    Replace the power supply unit.
    Replace the motherboard.

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  • Yalador
    Yalador Member Posts: 4 New User

    Morning!

    Lets see, a predator po7-655, it has a i7-14700KF and a 4080 RTX, i will check the fans after i get back home.

    The temps are fine while under stress the fan speed of most fans except the CPU is stable and the sound comes whenever the fans of the CPU shows 800-1500 RPM so thats why im assuming its one of the fans of the AIO, also i gently moved all cables near the fans and AIO to make sure it wasnt a cable unless its a cable i cant see from the glass panel side!

  • Yalador
    Yalador Member Posts: 4 New User

    I would have thought so aswell if it wasnt for the noise coming from around the CPU area. And isnt coil whine usually a high pitched screeching?

  • GotBanned
    GotBanned Member Posts: 637 Seasoned Specialist WiFi Icon

    I'm not so sure it's coil whine either.

    I believe you have two fans on the AIO and three on the GPU. Try to see if something is between a fan and the radiator.

    I don't know how and where the AIO fans are connected, but if possible unplug one fan and see if the noise goes away. If not, replug it and try the other one. For a more adventurous method keep on reading. ^^

    As for the GPU fans (can be done to AIO fans as awell), when you hear the sound slow down one of the fans for a short while by applying little force to the center hub with your finger. Just be careful not to touch the fan blades! You don't need to stop it, just lower its speed. If the sound changes or goes away, you fould the source.

  • Yalador
    Yalador Member Posts: 4 New User

    I actually tried slowing down the fans and found it is the fans of the radiator, so i sent Acer support a message and they told me to send it in for a hardware repair

  • billsey
    billsey ACE Posts: 33,507 Trailblazer

    Be sure and let us know what they find…

    Click on "Like" if you find my answer useful or click on "Yes" if it answers your question.