Originally Posted by friend'scatdied
There is insufficient evidence to support the idea that running at full load 24/7 for months on end causes these cards to expire prematurely. You'll find quite a bit of anecdotal information of blown VRMs and the like but there is a bias towards defect/fault incidence when looking at it this way that is difficult to normalize (given the volume of these GPUs used for the purpose over the time period).
There are already a few articles alleging that the theory of mining cards being any less reliable than gaming cards is overstated at worst and unfounded at best.
But there's not much evidence to strictly say it doesn't, either. Just buy Asus, MSI, Gigabyte and/or ask for the original invoice and you'll be fine.
I sold the majority of my minning rigs (Total of 18 HD7950s) at the peak of the Litecoin craze in December and made a killing. That will be the only time you will be able to sell 8 month old tech at over 100% of what you paid for them lol. /bragging
But I kept 2 Windforce 7950s for my personal PC to "play games" on when I "had time". But all they did was mine away for another 5 months. I would say they are just as good as they were when I bought them even after 1 whole year of mining at 100% GPU utilization.
I had the fans on around 80% the whole time and a box fan pointed at the side of my PC. And thats the key here, you have to keep the cards cool. But isn't that with everything? car engines, other electronics, human beings....
Keep them cool and they will last.