Limiting graphics settings. (Call of Duty: Black Ops 3)

Processor - intel I7-3770
Video card - Nvidia Geforce GTX 960 4G
RAM - 8GB

Prompt. Why do I have to limit the graphics settings, for example: texture quality is average, shadow quality is average. And this is the maximum I can turn on. Fps at the same time I have 90-100. I tried to change expirience in geforce, in the game the values ​​were set to low, the shadows improved, and the texture phot became very soapy, although Expirience was set to "Extra". Please help with these restrictions. It is not necessary to write "DELETE THE GAME AND FORGET THIS SHIT" ... Thanks in advance