HW Canucks highlights NV's DX12 CPU bottleneck at 1080p as well in the video link below:
RX 480 wiped the floor with the 1060 once DX12 was enabled at HWCanucks - 18-22% faster at 1080p.
https://youtu.be/C6j8s_pZlSI
At 1440p, Medium, RX 480's minimums matched GTX 1060's averages; with RX 480's average of 50 fps just 6 fps behind the 1070, but a whopping 22% ahead of the 1060.
DX12 is starting to show a pattern that Pascal = Paxwell. It will be a great GPU series from 2016-1H 2018, but clearly once DX12 GPU era kicks off, it's going to be smart to dump Pascal ASAP for Volta.