Question PC making strange, rattling sound

[Faeriewolf]

Hello! So a couple weeks ago, my PC suddenly began making a sort of rattling sound after being completely fine. As of now, after dusting it (which to be fair, it REALLY did need) and replacing my CPU cooler, the sound still pops up, sometimes being very faint, other times increasing in volume.

I attached the sound before all the fixes I tried (the type of sound pretty much hasn't changed) so hopefully someone recognizes it. Performance, by the way, is all perfectly fine from my perspective.

Thanks in advance y'all, I just don't want it to be something extremely damaging.

 

[helpstar]

Check all other fans, including psu fan