How to Increase RAM in Minecraft

💻 How to Increase RAM in Minecraft

Step-by-step guide for the main launchers: Default, CurseForge, and Modrinth

🟢 Default Minecraft Launcher

  1. Open the Minecraft Launcher.
  2. Go to the Installations tab.
  3. Hover over your Minecraft version and click the three dots ⋮ → Edit.
  4. Click on More Options.
  5. In the JVM Arguments field, look for something like:
    -Xmx2G -Xms1G
  6. Change the number after -Xmx to increase your RAM (for example, -Xmx4G for 4 GB).
  7. Save the changes and start the game.
💡 Tip: Don’t allocate more than 75% of your total system RAM, or your computer might slow down.

🟣 CurseForge Launcher

  1. Open the CurseForge Launcher.
  2. Click on your profile or modpack.
  3. Select More Options or the Settings ⚙️ icon.
  4. Go to the Game Specific or Java Arguments section.
  5. Find the Memory Allocation setting and adjust the amount of RAM.
  6. Save your changes and restart the modpack.
💡 Tip: Large modpacks (like RLCraft or All The Mods) usually need between 8 GB and 12 GB of RAM.

🟢 Modrinth Launcher

  1. Open the Modrinth App.
  2. Select your Minecraft instance.
  3. Click on Settings (⚙️ icon).
  4. Find the Java Settings or Memory Allocation option.
  5. Adjust the slider or enter the desired amount of RAM (e.g., 4096 MB = 4 GB).
  6. Save and launch the game.
💡 Tip: Modrinth saves changes automatically — make sure not to close before it finishes applying them.

📊 RAM Conversion Table (MB → GB)

This table helps you quickly find how much RAM you’re assigning when entering values in megabytes (MB).

Megabytes (MB) Gigabytes (GB) Recommended Use
1024 MB 1 GB Minimum for Vanilla Minecraft
2048 MB 2 GB Light mods / small modpacks
4096 MB 4 GB Recommended for most modpacks
6144 MB 6 GB Medium to heavy modpacks
8192 MB 8 GB Large modpacks or servers
12288 MB 12 GB Very large modpacks / high-end PCs
🧠 Remember: 1 GB = 1024 MB — most launchers accept values in either format (e.g., -Xmx4096M or -Xmx4G).