On my second 1080FTW and today after having it two weeks just got a black screen and fans at 100%.
My first one died though after 31 days. I woke up to find the fans spinning at 100% then. PC was sitting completely idle. Card never powered back up after that. This is really sad about this right now.
Emails Tech Support. This is obviously an issue and needs to be addressed. Something is wrong with these cards.