haidcar wrotei wouldnt get the RX470 8GB. at 1080p only couple of games can hit the 4GB limit while using AA, tweaking a couple of settings will bring the vram to under 4GB. plus on the 470, you are most likly to hit the GPU limit and you would have to crank settings down before you do with VRAM. remember more VRAM doesn't mean better performance.
I am on 1440p Freesync screen