Wolfv, please check the following thread Is 60hz buzz noise normal?.
You will be able to find very useful information about noise level on NUCs.
You can also check if you are running the latest BIOS version available for your product.
Do you mean this thread about fan noise? Re: Fan noise from D54250WYK
If not, please provide a link to the thread about NUC noise levels.
My 54250WYK has BIOS version 21 (the latest version is 24).
How can I find out if a BIOS update fixes buzzing noise?
Update the BIOS only if the newer BIOS version specifically solves a problem on your computer. Intel does not recommend BIOS updates for computers that do not need it.
I have the same model NUC, and have also dialed down the minimum fan speed (the default seems to have been raised in recent BIOS versions).
I hear no buzzing at all; my NUC is utterly silent from where I sit (about .5m away). So I would guess that what you hear is not "normal".
That's interesting. Can you hear a 60hz buzz if you put your ear against the NUC?
I appreciate you checking this for me.
I can't hear anything I would identify as 60Hz buzz. Of course I can hear even the quiet fan noise up close, so if there's something faint that's being amplified in your system, it might be masked in mine.
Thanks for your checking. What Fan Minimum Duty Cycle (%) or RPM are you running?
Today I listened to my NUC 54250WYK Fan Minimum Duty Cycles at 18%, 25%, and 40%.
25% sounds similar to 18%, but louder and at a higher frequency.
So now I'm thinking the buz sound is the fan (not something electrical).
Fan RPM is 1800 RPM at 18%.
60hz/2 = 1800 RPM.
So maybe an 18% fan sounds like a transformer buzzing at 60hz.
It's not loud enough to bother me, it's just that I didn't think a fan could sound like a transformer.
I've been running at 18%. I tried today at 18%, 25% and 40% as you did. 18% is inaudible to me. 25% is audible, but fairly quiet. 40% is clearly audible, like a laptop fan running at a medium-ish clip. Still sounds to me like there's something wrong with the fan (or you have supreme hearing).
Thank you Eric and Sylvia.
My hearing is normal; I tested for noise in a silent room (heater and refrigerator not running).
Just to be clear, I am not complaining about the noise level. At 18% Fan Minimum Duty Cycle:
- NUC 54250WYK is the quietest PC I ever had.
- The usual background noise masks the buzz sound.
- I can't hear it at arms length, even in a silent room (though I can hear it from half arms length).
I am just being paranoid about reliability because my previous PC died at two years old.
Remember that all electronic products are likely to fail, that is the reason why we recommend having all data backup
However, please recall that all Intel products have a 3 year warranty