[SOLVED] CPU i9 9900k making coil whine. (Video)

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tiendocali

Dec 21, 2018
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Please help
Hi, Can you help me by answering the questions?
My cpu i9 9900k coil whine when I have my ear close to the back or the front of the cpu when it run
When I plug in my speaker or headphone, I hear that coil whine on your speaker
I am having that problem. The coil whine is not loud and unnoticeable if you are not in a quite room, but when you plug in the speaker, it is so loud.
I use Asus z390 E gaming mother board. I am looking for the solution for my issue.
I hope it is because of the board that cause the cpu to sound like that so it is cheaper and I have more options to replace it.
Any helps from other builder of asus and intel chip are appreciated!
I got the same noise like these video below:
https://youtu.be/aXA6r5abybM
https://youtu.be/_nb5EBYgTes
 
Solution
terry4536
If you can isolate the noise to the motherboard, then the only practical solution is replacing the motherboard. The same is true if the graphics card is the problem. Replacing individual components on the motherboard is possible, but I wouldn't recommend it (for most people, but if you are an electrical engineer then go for it).

Generally you can localize the noise enough to tell if it is the power supply. Then you can remove the graphics card (or switch it out) to eliminate that as the source of the noise. The fans are easy too. Just place your finger on the center hub of the fan blades. As you apply a little pressure, the blades will slow down or stop. The pitch of the sound will change it it is the problem fan. And finally...
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I would guess that the noise that you are hearing is from the motherboard not the processor. There are coils on the motherboard that can emit a whining noise. In the neighborhood of the CPU, there are the voltage regulation circuitry that can also emit noise. There are other possibilities too, like inductors or capacitors. And then there are the fan bearings that can also emit a whiny noise as they begin to go bad.

And the PSU obviously is a big culprit (biggest coil in the PC) for coil whine.
 
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Processors don't have coil whine. My guess is also the video video card or VRM on the motherboard. Easy way to find out is load the CPU with Prime95. If it seqeels than its the MB VRM. Some of this can be solved by getting a power strip with a heavy duty line filter in it (or a UPS).
 
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If you can isolate the noise to the motherboard, then the only practical solution is replacing the motherboard. The same is true if the graphics card is the problem. Replacing individual components on the motherboard is possible, but I wouldn't recommend it (for most people, but if you are an electrical engineer then go for it).

Generally you can localize the noise enough to tell if it is the power supply. Then you can remove the graphics card (or switch it out) to eliminate that as the source of the noise. The fans are easy too. Just place your finger on the center hub of the fan blades. As you apply a little pressure, the blades will slow down or stop. The pitch of the sound will change it it is the problem fan. And finally you can use a roll of paper like a stethoscope to locate the area of the noise.

Hard drives also make noise, but I doubt that is the case here. But you can check those out too.

A UPS or an active power filter can be useful to eliminate electromagnetic noise, but I doubt it will be much help in this situation.

 
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Solution
I am pretty sure the coil whine is from the cpu. I did some researchs and there are some instruction to disable the C state of the cpu configurations on the mobo bios to stop the noise.
I did, the noise sounds much smaller now. But it is still there.
I am rma the mobo and get a better one. Idk if I should go with msi or gigabyte now
I like asus hero but I am scared off Asus now
I hope changing the mobo will solve this.

 
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,
It is up you. If you want something other than Asus, the Asrock Taichi Z390 , Gigabyte Aorurs Z390, and MSI Gaming Pro Carbon are all at that price point. I'd suggest the Asrock Taichi Z390 of those. The Gigabyte Master Z390 is a bit more, but that is an option too.
 
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i will - it was recommended to me after i went thru one Asrock Taichi - after flashing the latest BIOS P1.50 it fried my CPU as well as itself, could not get past post, then went thru two Gigabyte Z390 Aorus Master boards, both the BIOS was just not stable, would self corrupt. Went with the MSI MEG Z390 Ace and you'll have to pry it from my cold dead hands, i like it that much.

On the Asrock Taichi frying my CPU and itself, here's the thread - after i posted a warning about it, 2 or 3 other posters popped into the thread reporting they'd had issues with the same BIOS release and the one after (P1.60), and one of them reported same results, ie board and cpu frying, so my experience was not a "one off" event.
http://www.tomshardware.com/answers/id-3825393/heads-asrock-z390-taichi-motherboard-owners.html

On the GIg boards, there have been others posting here about unstable BIOS, but there have also been people happy with their GIG board, so i suspect it was a case of bad or weak BIOS chips

The MSI Ace has an extremely stable BIOS, + 13 phase VRM. Only complaints, as it's meant as a gaming board, there's no display port or HDMI port, so you will have to have a GPU and 2nd negative, kind of minor but the one "heatsink" for the M.2 SSD, not sure how it qualifies as a "heatsink" - it's made of stainless steel which is an insulator, but to make sure the heat does not escaple, they covered 50% of it with a 1/16" thick layer of polymer

i just left it off, and let the M.2 air cool

fwiw
 
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