- Change video settings.
- Set Java as a priority.
- Provide enough RAM.
- Close unnecessary apps and cleanup disks.
- Speed up your internet connection.
- Update your graphics card drivers.
What item causes the most lag in Minecraft?
It is most likely that the CPU will be your bottleneck, but RAM may also be the issue. Use F3 to check the RAM usage in-game. Redstone circuits require a lot of calculations, as do flowing water and lava when it is changing the path if its flow. Those are the two things most often responsible for lag in Minecraft.