Recommended Sound Dampening for PC Case - Other Hardware - Level1Techs Forums

So, my PC has a low “hum” to it for some reason. It’s not the fans to blame either. I can’t figure out what it is exactly, and I figure the best bet would be to buy sound dampening material for my case. Just wondering what sound dampening material is recommended for the internals of a PC case (mine is made out of pretty much solid aluminum, though I don’t know if that matters).

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