AOC AG251FG vs CS:GO

Good day to the SW. Ladies and gentlemen. Sorry to write so much, but really want to make sure everything's okay or worry

Bought recently, I myself monitor at 240hz AOC AG251FG. Monitor really like it, but still realize that their money is not what it should be like ( or I did not set up ). Connected the cable ( 1 ) Display Port put in the settings the Geforce GTX 960 4gb 240hz. Set up the colors in the game, that would be comfortable to see enemies and play, but the Desk is burning bright color, very hard to see, CS:GO the game itself is not colorful, to come under it to calibrate colors and end up with a curve calibrated on the desktop. So I do not feel these 240Hz in the game. Perhaps due to the resolution 4:3 + off g-sync ( eats FPS and frieze in places )

If anyone knows how to configure or have the same problems arose once and managed to fix it. Shovel a lot of information our and bourgeois, but never managed to find the correct answer.

Here additional. the old Pro:

PC:

The settings on the card:


Remind G-Sync / off

Color options:


Also, what about the tool Custom Resolution Utility video videos about it, but it is, as I understand about overclocking the monitor, but I think my system automatically determines how much I want to put Hz and adheres to it. Downloaded but haven't tried to use it to configure. Default but its performance indicates that such terrible figures