How To Give More RAM to Minecraft 1.21.5 – Allocate Memory
7Learn how to allocate more RAM to Minecraft Java 1.21.5 for smoother gameplay, better performance, and fewer crashes—especially with mods installed.
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💡 INFO 💡
If you want to stop lag and crashes in Minecraft Java Edition 1.21.5, allocating more RAM can drastically improve your gameplay, especially with mods installed.
Vanilla Minecraft 1.21.5 only needs around 2–4GB of RAM, but modded Minecraft often requires 6GB, 8GB, or even 10GB depending on how many mods you're using.
In this guide, we show you exactly how to add more RAM to Minecraft 1.21.5 using the JVM Arguments box in the launcher, changing values like -Xmx2G to -Xmx8G or more.
Whether you're playing with 50 mods or running massive modpacks in Minecraft 1.21.5, this tutorial will help you dedicate the right amount of RAM for smoother performance.
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