01.Why does Minecraft need RAM?
Unlike other games, **Minecraft** runs on Java. It creates a "virtual memory box" where it stores all information about blocks (chunks), entities, and mods. By default, Minecraft is set to use only 2GB of RAM. In 2026, with high-definition textures and heavy mods, 2GB is not enough even for the base game to load the map without stuttering.
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02.1. In the Official Launcher (Minecraft Java Edition)
- Open the Launcher and go to the Installations tab.
- Hover over the version you play and click on the three dots (...) > Edit.
- Click on 'More Options' at the bottom.
- In the 'JVM Arguments' field, you will see something like
-Xmx2G. - Change the '2G' to the desired value. E.g.: -Xmx4G for 4GB or -Xmx8G for 8GB.
- Save and start the game.
03.2. In TLauncher (Alternative)
Simplicity:
1. Open TLauncher and click on the Gear (Settings) in the bottom right corner.
2. In the sidebar, select 'Settings'.
3. You will see a slider called 'Memory Allocation'.
4. Drag it to the desired value (e.g., 4096MB for 4GB).
5. Click Save.
04.3. The Overflow Error: Don't go overboard!
Many players think: "If I have 16GB, I'll give 14GB to Minecraft".
Don't do that! If you allocate too much RAM, Windows and Java itself (through the Garbage Collector) will have trouble managing data cleanup, which causes massive stutters (1-second lags) every 2 minutes. The ideal for 2026 is to keep between 4GB and 6GB for the base game, going up to 8GB only for giant modpacks with hundreds of mods.
Don't do it Manually.
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Written by a verified expert
Douglas Felipe M. Gonçalves
Expert in Windows system optimization with years of experience in hardware diagnostics, kernel tuning, and advanced technical support. Founder of Voltris and developer of the Voltris Optimizer.
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By following this guide on How to Allocate more RAM to Minecraft (Official Launcher and TLauncher), you are equipped with the verified technical knowledge to solve this issue with confidence.
If you still have difficulties after following all steps, our expert support team is available for a personalized remote diagnosis. Every system is unique and may require a specific approach.