On April 5, black-sun [via ES] <[hidden email]
> I bought this in-line EMI filter.
Ah, so you are saying that the quality of the power coming in from the AC line is impacting the quality of the power coming from the PC internal power supply. I often wonder how independent/dependent these two things are.
BTW, I just got a new desktop tower PC from my employer while working at home. Really awful. A Dell Precision 3630. Avoid at all costs. So far I have found it helpful to move it away from me (longer cables, making it 9 feet away instead of the usual 3 feet), draping it in a grounding sheet (the kind you're supposed to use on a mattress), and surrounding it with RF absorption material. I also found that putting sheet metal nearby made things worse, presumably it's reflecting some of that noise back towards me.
I still have some other things to try, but so far my groundrules are to NOT open it up and mess with things inside of it.