Adjust your fan curve on the gpu 70c at stock clocks is whack
Try 100% fans on 60c.
Definitely not the issue. My overclocked 1080 Ti is on a custom loop and hits 45c. I'm thinking it's just the way some of these WUs are. I'm pretty much seeing exactly what LED Guy is seeing even with lower temps.
The best [email protected] GPUs I have are 1070s, and they consistently stay at 95-99% usage. My 1070s are running in Linux on kernel 4.16 and NVIDIA driver 390.48. There are a few WUs on AMD GPUs that behave like this, with only 85% usage, but I haven't seen any of my NVIDIA cards have this issue.