I would agree your board maybe reaching vrm thermal limits orch 990 motherboard good investment.
Not such a good investment when I've only just bought this bloody 970

I still think I can squeeze more out of it though. That's on hold for now though whilst I sort out this display driver crash and most importantly, work on my case cooling. When I get a chance today I'm gunna do some research on quiet/silent case fans to increase the airflow, been trying to get away not a lot at the moment due to the noise of the corsair fans.
I'm going to get some Noctua fans for the H80 rad so I can hopefully run that full pelt without disturbing the neighbours.
Unfortunately not much I can do with the VRM cooling at the moment, will keep thinking about that though.