i have a i 5 4690k and i need a gpu which can play big game titles like assassins creed, battle field, pretty much any game which comes. i will not be playing at ultra or high setting am ok with medium setting at 1600 x900 resolution and my psu is antec vp 450 all i basically want is gpu which can play every game that comes out in the market at 60 plus fps for 2 -3 years and also fits in my 450 watts psu and 200 dollar budget pls somebody give me professional advise , your help is highly appreciated.and pls keep in mind that it support dx12 api i hear nvidia is having problems i want something futureproof withabove requirements.