Question How to reduce my computer noise?

[archeye]

The HF audio sound from my PC is just getting too much and I really need to tackle this. After a few hours on my PC and I go into another room I still hear the high pitched noise and no I do not have tinnitus 🙂.
The fan noise is not great either but that is a secondary issue for me.

I have already raised the PC up on a styrofoam platter to remove any vibration going into the floor.

I have captured the sound using my desktop mic and a frequency analyser software app. My Desk (dining table) layout is also shown.

I can only think to make some form of thin metal enclosure to wrap around and cover the top of my PC. Maybe with some foam stuck on the inside of it. This I can make myself at fairly low cost and I know there would need to be spaces for airflow and cables.

Anyone have different suggestions?

 

[mindless1]

The noise is probably coming from inductors (or transformer) in the PSU or on the video card or motherboard. Isolate which it is and replace the component OR lather some epoxy on the inductor to fix its coils in place, though if it is the PSU transformer that is not practical to do.

Vibrations to the floor are typically not high frequency, but any such vibrations should be resolved by having rubber feet on the bottom of the case.

As far as building an enclosure, it is a lot of work and you will need the open areas, air intake and exhaust, baffled by flat sound absorbing panels so the sound has to bounce around before exiting, does not have a straight shot to the room.

Fan noise, get slower fans, larger if necessary to move enough air (could mean a CPU heatsink upgrade too) ,set them to spin slower with bios, software, or a fan controller. Noisy video card fan(s) tend to be more work to resolve if you're gaming and have limited available space to change that, but adding a side panel fan blowing at the card can reduce the card's fan needing to spin as fast to achieve a target temperature.

That, or building an enclosure, can be about trial and error. It's easier to just replace the noisy component, a direct path to success.

 

[Furious_Styles]

You need to open the case up and do your best to determine which component is causing the noise. Sometimes removing/disconnecting parts can help you narrow it down.