so i have decided to ditch my faithful core 2 quad q6600 and buy a used i5 2500k system complete for $200 / i wanted to ask about the gpu/ i am getting a gtx 670 (slightly used and in good condition) for $200 which really fits my budget or i could get a gtx 960 brand new from gigabyte for $280 (prices are a lot in my country 😛)which one should i get / would there be any bottleneck if i get either of the two / i have also heard 670 wont support dx 12 completely