The Kaby Lake NUC7i7BNH probably will below your expectation concerning blower noise. Here you can find some data about in this matter: Kaby Lake i7 NUC Review 4/4: Fan, Power, Linux, Conclusions (NUC7i7BNH) – The NUC Blog
Here you will find similar data for NUC7i5BNK: Kaby Lake i5 NUC Review 3/3: Fan, Power, Conlusions (NUC7i5BNK) – The NUC Blog
Did you consider to use NUC7i3BNH as HTCP ? The i3 Kaby Lake NUC Review (NUC7i3BNH) – Overview (1/3) – The NUC Blog
Why do you think it will be below my expectation?
Is it that loud all the time, even just while streaming from web? Can you estimate how much db?
Do you have one or have experience with one?
I don't want to go with the i3 or i5 models.If I buy a new Nuc wish to buy the latest and best model.
The last NUC I bought(NUC5I7RYH) is so quiet and I thought the
NUC7i7BNH will be the same in aspect of noise isn't it?
I was thinking that NUC7i7BNH noise level will be below you expectation, since it is not quiet under loads. 40dB noise level is equivalent of noise level in quiet library or bird calls. It is not very high level but it is noise that can disturb.
I do not have any experience with this NUC but I think it is overkill for media streaming.
According to review in internet, when I compare the noise level of NUC7i7BNH to NUC5i7RYH, looks that the first one is much more quiet (39.1dB vs 50.8dB under stress condition): INTEL NUC Kit NUC5i7RYH Review - Page 4 of 5 - Legit ReviewsPower Consumption and CPU Temperatures
50dB noise level in your NUC5i7RYH is equivalent of noise level in quiet office or moderate rainfall. So, if noise level of NUC5i7RYH is not disturbing you, you shall fill comfortable with NUC7i7BNH.
Hope this helps