High pitched and static noise directly from motherboard (behind CPU backplate)

[guardiny]

Hello, thanks for your reply.
I was thinking that the psu might be the issue. I already ordered a new psu and will test it in a few days when the new psu will get to me.
For now I use a brand new Corsair RM750, 750W, 80 plus Gold ->> brought specifically for this new pc.
Looks like I'm gonna test it with another one which I ordered ->> Gigabyte GP-P750GM, 80 PLUS® Gold, 750W, PFC Activ.

I dont think its about PSU, cause motherboad has own components to set voltage like a mosfets, regulators etc. not using directly PSU.

 

[zfi]

I had a horrible noise coming from the motherboard, near the CPU. I finally solved it just by setting some BIOS settings. Disabled C-states and some other settings and now it's gone

I wrote a quick guide if it helps anyone: https://randompctips.blogspot.com/2021/04/how-to-get-rid-of-coil-whine-by.html

 

[Asryan]

What are the drawback of disabling turbo and Enhanced Intel SpeedStep Technology ? does it means the CPU will remain at max OC all the time?

 

[zfi]

As far as I understand, they only slightly increase the power spent when the CPU is idling. But I might be wrong. Also, my setup is not overclocked, and I'm not in that game. So I cannot tell how it will affect a heavily overclocked system...

There might be a better combination of settings, some of those might be possible to enable without coil whine. I haven't gone through all the possibilities. I'm just happy the noise is gone!

 

[Asryan]

I have my cpu OC at 5hz all core ( 9900k) if someone can tell me what would change by disabling it

Thanks

 

[zfi]

The BIOS itself had some descriptions on each of the settings. Try checking there. You might also just try it out and see what happens. No point disabling it if it doesn't even help in your case.

 

[Asryan]

By disabling turbo, now my CPU is capped at 3.6ghz, what should i do to keep my oc?

 

[zfi]

You got rid of the noise? I'm afraid it looks like a tradeoff between small performance improvement vs noise.

 

[Asryan]

I haven't really checked.

just without EIST, the noise is still there.

But i won't run my cpu at 3.6ghz instead of 5ghz, that's not a solution for me no point having a 9900k if it's to have it run at 3.6
Is there a way to OC without turbo boost?

BTW what's the difference between speed shift and speed step?

 

[patomack]

Hey all, I'm having similar issues on my setup. MB is only noisy when moving the mouse around.

I duel boot both windows and linux. This is only an issue on windows for me.

 

[nicotp]

Hi. Hope it's ok to just confirm that disabling c-states in the bios of my (older) MSI motherboard eliminated the coil whine I had been hearing under Windows 10 for a long time. Peace at last! Thanks for this suggestion.

 

[MihaiPop]

Hello,

Thanks for reply,
This is exactly what i also did, i disabled c-states. and apparently that fixed my problem.
And i disabled almost everything that is not necessary.
I also disabled lights that i donot care about.

For me the motherboard is not that old, it's TUF GAMING Z490-PLUS (WI-FI) and CPU Intel(R) Core(TM) i9-10850K CPU @ 3.60GHz, 3601 Mhz, 10 Core(s), 20 Logical Processor(s).

 

[Yagma]

Disabling c-states fixed my coil whine also, on a 13700k, Gigabyte Z690. In this intel bios, you can either blanket disable them all, or disable many individual C-States. You can also disable C-States for the cores, and or the package as a whole (via Package C-State limit). I decided to try find the main offenders, by disabling one by one. I found that CE1 was the worst offender, however, all the other C-States for the cores also made noise under different loads. I ultimately had to disable c-states entirely for the cores, but left Package C-State Limit to the max, at C10. This eliminated coil whine, but I believe this should also allow the package as a whole to save power. However, I also wonder if perhaps it is limited to C3, after disabling CE1, C6/C7, C8, & C10.

After playing with throttle stop's Speed Shift EPP, (later reverting to windows native EPP) I was able to save much more power than I was with C-States enabled universally, and at the same time completely eliminate the coil whine.

Update: