Just wan't to drop a note here. The issue lies mostly with EVGA Cards. They allready posted on the official EVGA forums thaty the will set up an davanced RMA for their 980 FTW models. But i think the problem is very widespread under EVGA cards, especially under overclocked ones. I have an 980 gtx FTW Ac 2.0 and had crashes all over the place. Contacted my retailer this morning getting the answer that i was the 5 customer with the same issue this week with EVGA cards, and they switched them all for an equal model from MSI. I will get mine switched tomorrow and will update here if it fixed my issue. At the moment i run my old 680 gtx, with no crashes so far under dx11 high settings.
Sorry 4 typos, don't have much time right now.