Is this just me or is anyone else feeling/seeing the same results.

I have finally got round to playing some games after days of tweaking (Hooray), I was playing GTAV and had set graphics to high setting average of 90-95 fps under 1920x1080, then i switched to native resolution which is 2560x1440@ very high settings and was still getting 90-95fps in game even after i restarted to make sure at some stages going into the 110+ fps.
I then tested on other games, Witcher 3, Rise of tomb raider and GOW4, mafia3 and so on with similar results maybe 5 or so fps difference but not enough to warrant the change in game quality it seems that my rig has a all or nothing attitude in regards to graphics and preformance lol.