Did Hex have any issues similar to those reported around the net on the 1080?
http://www.overclock3d.net/articles/gpu_displays/gtx_1080_founders_edition_users_report_fan_revving_issues/1
https://www.techpowerup.com/222895/nvidia-gtx-1080-founders-edition-owners-complain-of-fan-revving-issues
https://forums.geforce.com/default/topic/938256/geforce-1000-series/gtx-1080-founders-edition-fan-issue-/
https://www.reddit.com/r/hardware/comments/4lg50x/gtx_1080_fe_owners_are_reporting_fan_revving/