About HP Spectre x360 13 (late 2018) new gem cut design

[simitu]

I would like to write my feedback for new gem cut HP spectre x360 13 notebook (late 2018 model). We received two same devices, but returned both of them to seller and luckily got money back. It's very beautiful, light and thin and I simply LOVE this new design! But great impression is gone, when notebook is turned on. It has terrible fan management, when it operates on AC. On battery it is very quite, but when plugged in, fan runs constantly and it is very loud (but notebook is cold, no need for so much aggressive cooling, don't understand such behaviour). Please don't advice silly tips as update bios, reset to defaults, disable turbo boost in power management, change to energy conservative power plan or set quiet profile in HP command centre and so on. Everything was tried, but when notebook is once plugged in to AC, fans goes mad. It can't be problem of one piece, because we had two and both of them acts the same. I want to ask HP, if there is plan to provide BIOS update, where fan management on AC will get option to acts really quiet as on battery? It's like Jekyll & Hyde comparing AC and battery mode. I don't think, that thermal management is bad designed, because on battery it runs quiet and no so hot and I tried to lower CPU performance to minimum on AC. I am very disappointed, but I like this model a lot and thinking to get another chance to it.

Another thing I want to mention is coil whine. Both of devices we got had it. First more audiable, second less, but it was there. I think, that in almost year 2019, on device for 1700 USD (price in our country for i7/16GiB/512GB configuration) it is unacceptable.

Thanks for reactions and sorry for my English, I'm not native speaker.

[Echo_Lake]

@simitu
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[emasty]

I have the exact same issue.

It is such a nice and powerfull notebook, but the thermal management is more than horrible.

HP, any update on that? Even BIOS update F21 rev.A did not bring any improvements.