Question Lag or FPS drop? Idk what this is but it’s a problem

ThatSourMelon

Commendable
Apr 21, 2019
363
12
1,715
So I recently got a new monitor, the dell 2719DGF. It’s 27 inches, 1440p, 155hz (when it’s overclocked), and has a 1ms response time. I set it up, downloaded all the drivers, installed the app for the monitor, and I changed it from 60hz to 144hz, then I overclocked it to 155hz (I have a DisplayPort 1.2). It looks beautiful. I changed the response time to “super fast”, which I assume is 1ms, that’s it, that was all the settings I touched. I have a Logitech g602 (I think) but the mouse says it’s 500hz, so I shouldn’t have a problem with that. But whenever I go one a game, idk how to explain it. When I move my mouse it seems laggy, like it’s a low FPS, I look in all of my games settings, they shouldn’t have an FPS cap, and when I turn in show FPS it’s well over 100. Is it my mouse? I had an old tv before this, off brand, 720p, and a response time of around 60ms, I didn’t have the same problem with that. Idk how to fix it and I think it’s affected my gameplay.