when i put my graphic settings back to default, it automaticly puts them to the highest possible and I then get 50-60 fps. I changed some of the settings and im getting now 60-70 which i think is really low for this type of pc.
use the nvidia control panel. there should be a icon in the bottom right pop up widow by the clock. go to the display section, and then change resolution option.
also, you probably need to use a display port to get the 144hz, if your using a HDMI then there is the issue with the hz being capped at 60. Your gpu usage should be near 100%, not in the 50s.
What I have discovered is that max/ultra settings are typically designed for taking screenshots and or other types of media. If you want the best performance while still looking good, I would recommend moving the graphics settings from the max option to the second highest video setting.
TL;DR Try sacrificing the max graphics for the high setting.