I haven't tweaked settings much. I let nvidia decide the default settings and it recommened 1440p. I changed it to 4k but with 70pc rendering so same as 1440p but with the user interface properly scaled. I got 45 fps benchmark. I turned off anti aliasing and overclocked best I could (presume my card is ec mining so got 10pc core and 5pc memory... Maybe could do better if renew thermal paste) I turned off anti aliasing and now get around 52 fps on benchmark.
I get performance I am happy with from a 1080 at 4k. I play on ultra with one or two things disabled (such as MSAA) and yes it drops beneath 60fps at times but still an enjoyable experience.
I'll take a look as iv been looking at a 1070ti as an upgrade to my r9 290. Gr widlands play around 40-45 fps on 1440p and titanfall 2 around 60fps 1440p. I'm looking for 4k at 40fps+ but what's put me off are reviews of the rtx 2070 which they claim still can't game at 4k and this thing outperforms the old 1080 card. Maybe tweeking the settings is the way forward. Iv played titanfall in 4k which looks stunning but 20 fps is unplayble. Are you playing widlands at 4k?
One of the videos that convinced me to try a gtx 1070 as so much cheaper yet not much difference in visuals
I recently got a gtx 1070 for 210 quid on ebay and sold my old rx470. I am enjoying 4k on medium settings as I watched a few youtube videos saying little difference. You can always get ultra textures it is just slight difference in shadow edges on ultra vs medium. Other games like ghost tecon wildlands I am playing 70pc rendering so 1440p but still looks amazing compared to my old 1080p display. I am getting arounf 50fps on ghost recond wildlands with a 10pc overclock.