Question Buzzing noise from case fans

[puw2]

This is a very minor noise and some wouldnt mind it that much but sadly i am not one of those people

https://imgur.com/a/21ZNhOW

This noise is surely coming from the case fans, as i unplugged the hub and the noise dissappeared.

The noise is still there even when i stopped the fans from spinning with my finger.

Anyone know what this is? Too much voltage from the hub? Is there a fix?

 

[Aeacus]

That rattle sound? If so, it is fan bearing noise.

The noise is still there even when i stopped the fans from spinning with my finger.

Did you stop all the fans at once? Or one-by-one? Since there can be more than 1 fan that has this bearing rattle.

You said that fans are connected to the hub. Can you control the fans RPM? Since with this, you could eliminate (or lessen) the bearing rattle.

Some fans will develop bearing rattle (instability) at fixed RPM range.
E.g out of the 6x NZXT AER140 RGB fans that i have between two PCs, 3x of them produce bearing rattle when fan is spinning ~1200-1400 RPM. If fan spins slower or faster than that affected range, there is no bearing rattle.

So, increase/decrease your fan RPM and hear at which point the noise either lessens or disappears completely.


In a chance it isn't bearing rattle, then it could be vibration resonance as well. Tighten or loosen the fan screws, to get rid of the vibration noise. There are even noise dampening corners/washers and rubber "screws" that you can use to get rid of fan vibration noise. For the latter, these things,
amazon: https://www.amazon.com/DKARDU-Reducing-Silicone-Anti-Vibration-Computer/dp/B0C1444V9W

I used to use those rubber screws for some time with my old AMD build, to see how they fared. Difficult to install. Even more difficult to take off. But since my fans didn't produce vibration noise to begin with, they had no use for me. But at least i got the experience and knowledge about them.

 

[Lutfij]

If the fans came bundled with your case and the case was cheap to begin with brand new, then you have what usually equates to bottom of the barrel fans from the case maker.

Anyone know what this is? Too much voltage from the hub? Is there a fix?
What is the make and model of the case? You speak of a hub, did this hub come bundled with your chassis? There's nothing to fix a bad quality fan.

IMHO, you should've started the video with audio away from the system and as you approached said system, zoomed into the area where the noise is coming from. Helps lend context to the source of the sound.

 

[Gururu]

You can put a dampener between your case fans and the case. Sounds like your case is acting like an amplifier to the vibrations from the fan(s). Loosen the screws on the culprit fans, insert some thin rubber spaces between the fan and case and retighten screws.