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On Wednesday 31 December 2008 17:36:39 Paul Hartman wrote: |
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> I can't remember the exact reasoning, but I do recall being told "it's |
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> normal" and that it varies from one system to another, even with the |
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> same hardware. I think it's related to capacitors or voltage regulator |
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> or something like that. (I am not an electrical engineer) |
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If it's consistent with high load, it's most likely inductors windowing |
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vibrating inside their casing. i.e. loosely wound transformers. The biggest |
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one is in the power supply, which is easy enough to swap out and check. |
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The irritating part is that it's extremely hard to detect where the sound |
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comes from - you can't just turn your head to get the direction as human ears |
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aren't too good at those frequencies |
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> When trying KDE4 with all the desktop effects, it was really annoying, |
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> everything I did would cause the hissing noise, presumably because |
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> it's using more CPU load to do basic things. |
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> |
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> So, in other words, "it's normal". :) |
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Harmless, yes. Annoying, yes. Normal, should not be :-) |
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This happens when vendors use cut-rate components, or the Chinese factory they |
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outsourced the production to uses crappy parts. |
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-- |
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alan dot mckinnon at gmail dot com |
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