Chevinator123 on 26 December 2016
This is a common misconception. A game thats 30fps wont magically shoot to 60fps if u drop it to 900p. In reality it would maybe gain 4-8 frames on average. Dropping resolution is typically used when a game is just shy of its targeted fps.
The entire game has to be designed around a 60fps target if thats what they want. MGSV is a good example. 1080p locked 60fps game, runs great, has great IQ but visually you can tell that the world is pretty barren and empty with only small bases with patrolling guards.
The games you mentioned BF1 and Nier are both targeted 60fps games from the beginning and even then they still drop frames on OG PS4 even at 900p.
