Question: can rtx 2060 run 1440p 144hz?
Answer: 1440p on a 2060 will get you above 80 frames. I would upgrade your GPU before you upgrade the monitor (or at the same time). 1080p 144hz is going to be a better experience than 1440p 60hz which is the kind of frames you can generally expect the 2060 to get on newer AAA titles at 1440p.