FPS issues after playing certain amount of time

[toxi2202]

Im having issues after updating my game to 1.21 where my FPS will drop/stutter after certain amount of time the issue goes away when I leave the world and rejoin or press CTRL+F1 

am playing with mods and my specs are 

CPU: Ryzen 7 5800x

GPU: RX 7900GRE

RAM: 32gb 3600Mhz 

does anyone may know how to fix this or wether this is a known issue ?

 

In the video the first scene is Before and after the cut is after the issue started

Edited September 21, 2025 by toxi2202

[LadyWYT]

Welcome to the forums! 

5 hours ago, toxi2202 said:

am playing with mods

My initial questions are which mods, and does the issue still happen in the vanilla game? Not saying that a mod is responsible, but when playing a modded client mods are generally the first thing to check when issues arise.

Otherwise, I would suspect that you might be playing with VSync turned on. There were changes to the rendering system in 1.21, I believe, that seem to be more noticeable on certain hardware with VSync enabled(ie, produces a graph like the one in the video). Turning off VSync may smooth out the graph, however, I would also note that your framerate still seems to remain high despite the issues. Unless your frames are dropping enough to make the game actively choppy to play, I'm not sure that I would worry too much about it, in the event it is VSync related or something.

[toxi2202]

After turning off mods and turning them back on the mod causing the problems was Overhaul Libary weirdly enough it showed as compatible with the game version but one look in the mod browser showed that I was using a old version after updating to the newest release the issue seems to have disapeared also got better min fps now to

Thanks for the help 

On 9/22/2025 at 1:40 AM, LadyWYT said:

Welcome to the forums! 

My initial questions are which mods, and does the issue still happen in the vanilla game? Not saying that a mod is responsible, but when playing a modded client mods are generally the first thing to check when issues arise.

Otherwise, I would suspect that you might be playing with VSync turned on. There were changes to the rendering system in 1.21, I believe, that seem to be more noticeable on certain hardware with VSync enabled(ie, produces a graph like the one in the video). Turning off VSync may smooth out the graph, however, I would also note that your framerate still seems to remain high despite the issues. Unless your frames are dropping enough to make the game actively choppy to play, I'm not sure that I would worry too much about it, in the event it is VSync related or something.

Edited September 24, 2025 by toxi2202