i7 6700K
z170 pro gaming
CMK16GX4M4B3200C16R
I just tried bios ver. 0803 and got better results, bios version really makes a difference albeit being an older one. I have yet to see whether the memory is stable for gaming, although booting and running works just fine.
Currently running:
xmp 3200
4500Ghz (100x45)
1.35v Adaptive, LLC 4 (well tested)
So far so good, for some reason all the bios updates are worse for stability. Some don't even get me into windows by only overclocking.
EDIT: All stable without any issues so far, hope this helps others with similar setup.