After some great analysis:
The best 4K TVS for gaming
The Best Gaming TVs - Summer 2017
I think it will be great have some settings discuss about that tv here
Rtings settings :
http://www.rtings.com/tv/reviews/sony/x900e/settings?uxtv=a5bc
Avs settings :
https://www.youtube.com/watch?v=FFsRJ3EU8Dg
The best 4K TVS for gaming
Sony X900E - Best Overall
The Best Gaming TVs - Summer 2017
Best Mid-Range TV for Gaming : The Winner: Sony X900E
For a mid-range option, we recommend the Sony X900E. It's a versatile 4k LED TV that's especially good for playing video games, thanks to its low input lag and motion blur. Thanks to its good value compared to the competing Samsung MU8000 and LG SJ8500, it's a good choice if you want some of the best picture quality found on an LED TV .
It doesn't have blacks as deep as what an OLED TV can do, but it's still a great performer in a dark room thanks to its well-executed local dimming feature. It's brighter by a fair margin too, which is great if you planned to use it in a well-lit environment.
Overall, the X900E is sure to please most gamers, especially if it isn't the only thing it's going to be used for. It's the best alternative to OLEDs if they are out of your budget.
I think it will be great have some settings discuss about that tv here
Rtings settings :
http://www.rtings.com/tv/reviews/sony/x900e/settings?uxtv=a5bc
Avs settings :
https://www.youtube.com/watch?v=FFsRJ3EU8Dg
Game Mode
Brightness 20 (Max on HDR)
Contrast 90
Gamma 0
Black Level 50
Adv. contrast enhancer Off
Auto local dimming Medium
X-tended Dynamic Range Off (High on HDR)
Colour 50
Hue 0
Colour temperature Expert 1
R-Gain Max
G-Gain -3
B-Gain -8
Live Color off
Sharpness 50
Reality Creation Off
Smooth gradation Off
Motionflow Off