I am going to buy a new 1080p monitor for my RTX 2060 oc. The AOC 24G2 144Hz or the 24G2E5 75Hz are good options. What I do not understand is if a high refresh rate, like the 144Hz will affect the performance of my VGA or even CPU? Will there be a drop in fps? If get the 144Hz and find that the performance is not as good as before then can I lower the refresh rate to 120 or 75 or even down to 60 and the monitor will still work perfectly fine?