I have a pair of GTX650 bought in 2012 still running BOINC at 100% 24/7. Air cooled, fans on Auto, no OC with an open case. Had various other GTX running for 5 years plus no problems all on Boinc or Folding@home.
Only added Team Red to the farm since starting Alt Coin mining in last year so not sure on those, but Team Green can certainly do 5 years no problems at all.
Those date back to the days when cards had fan curves from the manufacturer designed to keep the cards COOL, instead of the current insanity of putting "quiet" as FAR MORE IMPORTANT than "cool".
EVGA in particular had major issues with it's early 1070 models because the FAN CURVE WAS SET WAY TOO LOW (despite them pointing at "didn't have thermal pads on the VRM models", the cards last just FINE and stay plenty cool enough if you turn the fans up past the factory-default UNDER 40% AT 80C insanity - the actual final FIX out of EVGA was a BIOS change that turned the fan curve up to more like 50% at 70C).
Factory default fan curves on ANY recent card are set crazy-low, and ignore the possibility of the card being used in a "compute" capability (the manufacturer wants you to pay the crazy-expensive price for their "professional" or "workstation" cards instead even though they tend to use the SAME GPU and the SAME ram and have an INFERIOR cooling solution so they have to clock them a TON lower to keep cool).
I always use MSI afterburner to set the fan curve. And I only use 70% of the rated maximum power.