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.
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.
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.