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I've heard noise (high-frequency whine, changing depending on load) from my laptop power supply at times, I think. I wonder if that's not a problem for some rea
by jtbayly 8y ago
I've heard noise (high-frequency whine, changing depending on load) from my laptop power supply at times, I think. I wonder if that's not a problem for some reason on desktop power supplies.
- onli 8y agoIt can be a problem, also with PC psus. Not all of them have coil whine, and it depends on the connected components, but it definitely happens. In my case it is the monitor that of all my components has the worst coil whine (actually the PWM brightness regulation).
- Drdrdrq 8y agoIn my case also, unless I set the sound volume of built in speakers to 0. Since they are not connected anyway that solves it for me. It is still annoying that we have to put up with this though.
- stefan_ 8y agoIt's not limited to the power supply, ceramic capacitors are on basically all complex circuit boards now, and most of them will readily sing and whine. It can be eliminated through careful design (reducing ripple) or paying nanocents more for the caps, but as far as I can tell Lenovo doesn't give a fuck.
- 21 8y agoI have a 5V-2A phone charger which whines. So it can happen even on low-powered devices.
- jtbayly 8y agoYes, I have one, too. I can hear it from across the room on a quiet night. My wife thinks I'm crazy because I often go to unplug it, but she can't hear it.
- betaby 8y agoIt's a problem, most desktop PSU, even from recognized brands produce coil whine, especially after 3+ years.