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Re:Completely Silent Computer by zeusk on Tuesday May 15, 2018 @03:09PM (#17076779)
That's called coil whine, often a result of shoddy power components or construction (and often in either PSU or GPU).
Re:Completely Silent Computer by nextos on Tuesday May 15, 2018 @03:24PM (#17076951)
Capacitors in PSUs and GPUs are often, but not always, the parts to blame.
Re:Completely Silent Computer by zeusk on Tuesday May 15, 2018 @03:27PM (#17076984)
Inductors, actually, are most often to blame (hence - coil whine, also why they're covered in goop in most devices).