4 Things That Actually Fix Minecraft Stutter (More RAM Isn't One)

Check your RAM allocation Allocating 8–10GB is usually enough. Going past 10GB makes Java garbage collection take longer, which can worsen stutters.

Tweak your JVM arguments Use G1GC, adjust -XX:G1NewSizePercent, and add -Dsun.rmi.dgc.server.gcInterval=2147483646. These settings reduce garbage collection pauses.

Install performance mods Sodium, Lithium, and Phosphorus cut stutter from chunk loading and entity processing. Only use them if your modpack supports them.

Upgrade your CPU’s single-core speed Minecraft’s tick rate bogs down from too many entities and machines. A faster single core helps more than more RAM.