Hello I bought a gtx-970 at newegg and registered it and have 70 days left to step up.
My question is I do not see model # EVGA  04G-P4-2986-KR for step up.  I have model EVGA 04G-P4-3975-KR and was not gonna get 980 but due to vram and it happens to affect the games I like, and I built my system to game.Can I step up to that model and gladly pay difference I always buy overclocked or should I go and try return to newegg and buy from them? 
   Thank you curtis

Thanks for reply will contact newegg its under 30 days just not happy. I understand it is full 4gb card but not happy I feel cheated would have sucked it up and got 980 sc to begin with was wondering why some games slow down than I read up late on my part .Saw articale that said NVidia will work with retailers to try get refund and I would have paid difference figured I would try here first thought I read somewhere evga will work with you.I have bought 6 evga cards so far although not evgas fault figured would be quicker than newegg thanks again will contact newegg return my card