Thanks for answering.
Not whine like it usually is on videocards, more like screeching.
Not mine video, but it's EXACTLEY the same as here:
https://www.youtube.com/watch?v=JD8oRu39o8sWith enabled C-states+SpeedStep+unlocked Ring clock it's the noisiest (in idle, more with mouse movements).
With C-states off and Ring Clock fixed at 43 it's inaudible in idle, but if moving mouse it still can be heard (though not an issue for me at this level).
I am using "Auto" overclocking and Turbo mode enabled. It's 48/50 under load and balanced power preset in windows, so it goes down to 8 sometimes.
Mem is at 3800 with enabled XMP. CPU Core Voltage is Adaptive.
I tried changing SpreadSpectrum, changing clock of VRM etc, nothing affects this except turning both features off like described above.
It's the same as discussed on 11 pages in the thread I linked in 1st post, but it's newer MB and it was fixed there by introducing new BIOS settings. Wondering if same can be done here.