Low quality of textures this 3 GB memory

Hello
I am playing on Linux with GeForce 1060 3 GB. I can only set low quality textures in graphic settings. But video card’s memory uses about 30 percent (1680x1080, 60 FPS). Is there any way to set another texture quality with my hardware?

Upd: I have changed texture quality in graphic settings and it’s working. One month ago it was a problem, but it’s ok now. May be this option automatically charges when video memory is full and it was a bug with memory using in the game.