razer stealth 13 and razer core x

Hello I'm curious about improving my gpus performance. I have the razer stealth 13.3 I believe its the 2019 model with the Nvidia 1650 max-q 4gb graphics card. I find a lot of mixed information about the razer core x, Some sites say it overrides the gpu your using, others that it doesnt. Is it possible to use the razer core x and have both gpus working with SLI maybe? or would I just have to spend big on a much better gpu? I recently got an ultrawide 21:9 1440 144HZ monitor and Id really like to be able to use it well, and I know that the current GPU i have just isnt good enough, whats my best options? Thanks!!