gtx 970 vram problem(so which gpu should i get)

I would def go with the 295x2 then, it will be a little slower than the 980 when only using one core like in UE4, but MUCH faster in games that can run both cores. But really what I said above is the same for the 295x2 since it’s basically two R9 290x. Also the 295x2 has a very nice cooler.