Why Does 75 FPS Feel Like 30 FPS on My New Monitor?

First off, double-check that your monitor is actually set to run at 75Hz. It’s easy to overlook, but if those settings aren’t right, that could be messing things up. Also, make sure to look at how your games are running in terms of frame rate to see if they match what you're expecting.

You should definitely check your Windows display settings. Sometimes if you plug your monitor into the wrong HDMI port, it might default to a lower refresh rate like 30Hz instead of 100Hz. That could be causing the laggy feel. Also, try switching ports; it might help.

You might be experiencing something called V-Sync judder. When your monitor isn't a variable refresh rate (VRR) display, your frame rate should ideally match the refresh rate. So yes, lowering the refresh rate back to 75Hz might help. If you want to try something different, look into using Adaptive V-Sync in your graphics settings—it can disable V-Sync when your FPS drops below the refresh rate, but be warned: it can also cause screen tearing.

I agree with others that response time might be playing a role here. If your new monitor has worse pixel response, it could be making 75 FPS feel worse than on your old screen.

What’s your monitor model? Remember that refresh rate isn’t everything; if your new one has a slower response time or issues like ghosting, that can really affect how smooth things feel even at higher FPS.