I think if vendors of videocards really excited, who manages videocards ( or to gamers) they would find methods of a solution of a problem. Here I 5 minutes thinking over this question at once found the decision:
in the video chip the counter of the calculations produced by it. To restrict operation of the video chip by 2 years of usage 24 on 7 that will correspond approximately to 5-10 years (and more and it is not necessary), or to 20 years usages. To make the simple mechanism of reading of percent of the worked out resource. Well and for separately to leave videocards without such counter on 1.5x to the price.
All... It is enough This simple action, that lost interest to cards of that vendor who so makes.
But Nvidia, such do not do anything, and only on news resources tell that as it badly from as they care of gamers, make recommendations to sellers to sell videocards to preferably gamers than , etc. And after all probably many trust in it.