I have those specs as mentioned above, however I’m getting a constant FPS of 120-190, constantly dipping with any movement I make. Playing on 1440p and all low settings. Help please

The only thing I like about icebox is the indoor A site. I'd really like to see a fully indoor map in some giant hotel or museum or whatever. I think it would also be a small "nerf" to mobility champs too and would maybe force different age...