Rule of thumb, I have been mining for almost 4 years with 120 plus cards. Lot`s of expensive lessons learnt!
1. Power supply, never push your power supply to it`s limit. Sweet spot is around 60% utilization.
2. Dust is a card killer, make sure you maintain dust as well as you can
3. Temperatures, place your rigs in a well ventilated room. Try remove the heat generated by the cards (Extractor fan).
4. Don`t be an IDIOT and OC your cards to the max. Loads of people are chasing hashrate instead of finding a sweet spot.. pushing a card to just under the point where it crashes is really idiotic. Your card might cope for a couple of months but it will die on you after a while.
Cheers
Totally agree and don't push the card too hard. A little loss in performance is fine and running 7x24 trouble-free could be more important.
Played with ~10 1080Ti in past years, either founder's edition or Auros. It's a surprise that founder's edition seemed more stable in a mild OC with limited TDP/fan-speed, but + 10 degrees hotter (still under 80C).