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Is it normal to hear this sound coming from the psu?

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It is probably just coil whine.
 
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Does this happen in general? Is it normal for something like this to happen?
Coil whine ? Some PSUs will have coil whine more audible than others.
 
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what PSU that you use? it's coil whine, sometimes happened
 

#22

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I hear mostly fans running with little addition more similar to fan bearing noise than coil whine. But I know that coil whine is type of noise hard to reproduce with recording similarly to reality. You got plenty of videos online showing coil whine to compare and be more sure.

Does this happen in general? Is it normal for something like this to happen?

It's normal behaviour, nothing bad happens and it's lottery - various units of the same component will vary with how loud they wine. If possible, it's best to return whiny thing a try luck with replacement. Imo being able to keep your computer inaudible during low load is fundamental and PSU is a component being likely to stay with you for longer.
 
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i must have bad ears because it sounds normal to me just the air being moved.
 
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What brand/model PSU do you have?
 
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It's normal behaviour,
Coil whine is not normal, but sadly, it is common. Coil whine is caused vibration as current flows through the device - a natural characteristic of such devices. However, "normal" would be for the vibration to be suppressed or isolated to the point it is inaudible. This is commonly achieved during manufacturing by dipping or coating the coils in some sort of varnish, resin, rubberized plastics, or even epoxy glue. This problem there is when you coat electronic devices like that, you effectively wrap a heat-trapping blanket around it.

One solution is during manufacturing of the PSU (or graphics card, or whatever) is to use bigger, more capable coils. But sadly, space is often a premium, but also it typically is a cost-cutting measure to use less capable (but still adequate) devices that end up making more noise.

Once in the field, whine/vibration can often be suppressed by applying hot-glue, epoxy, super-glue, or liquid electrical tape to the coils (same with buzzing transformer plates). However, this solution again risks increased heat issues, does not always work and absolutely will void any warranty! :(

Having said all that, Lex is absolutely correct, while coil whine can be extremely annoying, "coil whine is common and nothing to be worried about as far as functionality concerned."

Edit comment: fixed typo.
 
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#22

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Coil whine is not normal, but sadly, it is common. Coil while is caused vibration as current flows through the device - a natural characteristic of such devices. However, "normal" would be for the vibration to be suppressed or isolated to the point it is inaudible. This is commonly achieved during manufacturing by dipping or coating the coils in some sort of varnish, resin, rubberized plastics, or even epoxy glue. This problem there is when you coat electronic devices like that, you effectively wrap a heat-trapping blanket around it.

One solution is during manufacturing of the PSU (or graphics card, or whatever) is to use bigger, more capable coils. But sadly, space is often a premium, but also it typically is a cost-cutting measure to use less capable (but still adequate) devices that end up making more noise.

Once in the field, whine/vibration can often be suppressed by applying hot-glue, epoxy, super-glue, or liquid electrical tape to the coils (same with buzzing transformer plates). However, this solution again risks increased heat issues, does not always work and absolutely will void any warranty! :(

Having said all that, Lex is absolutely correct, while coil whine can be extremely annoying, "coil whine is common and nothing to be worried about as far as functionality concerned."

I won't argue about using word "normal", because it depends on context you cut out with the sentence. But nice that you shared some knowledge - it's not solution for OP, but maybe somebody will find it interesting :)
 
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I won't argue about using word "normal", because it depends on context you cut out with the sentence.
:rolleyes: And yet you just presented an argument - as in a point of debate, not an angry quarrel.

Coils are not supposed to make noise. That is just a fact. So in my opinion, there is no context in which it would be considered "normal" for coils to make noise, regardless how "common" it may be.

Common is not the same as normal.
 

#22

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:rolleyes: And yet you just presented an argument - as in a point of debate, not an angry quarrel.

Coils are not supposed to make noise. That is just a fact. So in my opinion, there is no context in which it would be considered "normal" for coils to make noise, regardless how "common" it may be.

Common is not the same as normal.

And in my opinion with it's original context it's totally fine. As you yourself noticed, in the end it's relative ;)
 
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LOL Okay. Movin' on.
 
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cost-cutting measure to use less capable (but still adequate) devices that end up making more noise.
often an inductor in the resonant converter is the culprit but other hardware can impact this such as introducing a new GPU since that has an impact on current demands. So to further your point, not testing enough on various GPU (another cost cutting measure) by the OEM and/or brand
 
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Coils are not supposed to make noise. That is just a fact. So in my opinion, there is no context in which it would be considered "normal" for coils to make noise, regardless how "common" it may be.
Oh my God here we go again.

Inductors make noise because the coils inside of them start to vibrate when the electrical current that passes through them is switched on and off, the higher the frequency the more vibrations and noise. So yes coils do make noise.
 
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Oh my God here we go again.

Inductors make noise because the coils inside of them start to vibrate when the electrical current that passes through them is switched on and off, the higher the frequency the more vibrations and noise. So yes coils do make noise.
Gee whiz. What the heck are you on about now? Trolling again? :(

First, I already explained how the noise is made, so why repeat it? That is just wasting everyone's, including your own time.

Second, did I, did anyone, even once in this thread say coils don't make noise? No!

What I said was, repeatedly, is it is not "normal". Coils are not supposed to make noise.

If it was "normal", every TV, motherboard, radio, graphics card, power supply (and many other devices) everywhere would be buzzing and humming and/or whining all the time and every time they were powered on.

Is that happening? NO!!!!

Why?

Because it is NOT "normal" for coils to whine!!!!!
 
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