Play single player world on pc without shader and get only 30 fps with an rtx 3070 and i7 10700k. Yesterday I still had a cap of 240fps why is that?
Do you have a FPS limit in the settings or something? It's probably because of that.
No is limited at 240fps
Did you also select the graphics card for Minecraft in the Nvidia control panel and not your graphics chip?
Latest graphics driver installed? Any texture packages that pull FPS or shaders?
Is a kf processor so only the 3070 comes into question and that is selected
Optifine inside?
Maybe try a bit around with it.
Did you spawn something in your world that is too much, or does it affect which server or which world?
Change shader.
Change texturepack.
Take mods from the mod folder.
I would always set FPS to unlimited, limiting it gives your game no leeway.