FPS dropping

[Maddenman8815]

Alright so I got a high refresh display today 165hz I have a 2070super  and run at 1440p ultra on Fo 76, I get steady 85fps, not complaining there it’s smooth plays good, but if I drop my refresh rate on nividia control panel from 165 to 144 my frames in game will go down to 60 then I drop it to 100 and they drop to 40-50? Why? It’s not under what I’m displaying currently so I shouldn’t affect my frames? I would like to run high fps but I just don’t think it can handle more( my GC it boost over 1900 MHz) I can run 4K at 60 so I was expecting 1440 to atleast go to 120 

-monitor is a XZ272U Pbmiiphx 

-GC is gigabyte windforce 3x oc

-cpu is Ryzen 7 3700x 

[Flyingchickennugget27]

Thats normal, because if you drop the refresh rate you also drop the fps(frames per SECOND) and the refresh rate is how much your screen refreshes every SECOND. It makes sense right