Weird breathing grinding noise from pc

[Humzaali123]

Hi,

A weird grinding noise is coming out from my PC in a breathing pattern. The grinding starts low and then go ups and then back down. This all happens in around 5 seconds. Normally this happens 3-4 times and then it stops. It comes back quite frequently. I can't pinpoint exactly what makes it happen as it does happen when my computer is just on but it does happen more frequently when under some load.

Would appreciate any answers!

 

[hang-the-9]

No way to know what this is without knowing where it's coming from. Could be a hard drive, could be a fan. Nothing else would cause noises in a case that sounds like grinding.