Running fans full speed, for a long long time might wear out the bearings....but I don't consider this abuse - running the poor card @ 1.3v under full load is.
For a few hours benchmarks its fine, but 24/7 no card is going to last long at that voltage with the stock HSF
Try telling that to new miners who never built a system before, or might've just been casually gaming at most.
It doesn't matter if your core temp shows 70-80c in afterburner.
The card *will* die with that voltage in a few months, maybe even weeks. And there are examples on the forum if you have the motivation to search for these 2-week-wonders.