How to Allocate More RAM to Minecraft Launchers | Minecraft | Knowledgebase Article

It is crucial to have an ample amount of RAM to ensure optimal performance and prevent game crashes for different versions of Minecraft, including both vanilla and modded versions. This article will delve into the techniques of allocating additional RAM to frequently utilized Launchers.

  • Launch the Launcher and confirm that you are in the Java Edition section of the launcher.

  • Click on the installations tab and find which installation you want to allocate more RAM to.Accessing the installations tab in the Minecraft Launcher

  • Click on the installations tab and find which installation you want to allocate more RAM to.Accessing the installations tab in the Minecraft Launcher

  • Hover over the installation you want to allocate more RAM to and click on the more options (3-dot menu) and click on edit.

    Accessing the installation settings in the Minecraft Launcher

  • Click on the More Options text.

    Accessing additional options in the Minecraft Launcher

  • Change the number after the argument -Xmx to allocate more RAM. (i.e. -Xmx1G = 1GB of RAM, -Xmx6G = 6GB of RAM etc.)

    Changing the amount of allocated memory in the Minecraft Launcher

  • ATLauncher offers users two distinct methods for allocating RAM. The initial approach allows for setting the default RAM across all instances, while the second method permits the customization of RAM allocation for specific instances.

    Setting the Default RAM Allocation for All Instances

  • Click on the Settings option located on the sidebar.

  • Click the Java/Minecraft tab.

    ATLauncher Settings Java/Minecraft specific settings page

  • Change the Maximum Memory/Ram option to allocate more RAM as the default for all ATLauncher instances. Note that this option is in Megabytes, a Gigabyte is approximately 1024 Megabytes (i.e. 1GB = 1024MB, 4GB = 4096MB, etc.)

    Allocating more RAM within the ATLauncher Java/Minecraft settings

  • Allocating RAM to an Individual Instance

  • Click on “Instances” in the side panel.

  • Click on the settings button for the instance you want to allocate more RAM to.

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    Accessing instance specific settings within ATLauncher

  • Click on the Java/Minecraft Preferences section.

  • Change the Maximum Memory/Ram option to allocate more RAM as the default for all ATLauncher instances. Note that this option is in Megabytes, a Gigabyte is approximately 1024 Megabytes. (i.e. 1GB = 1024MB, 4GB = 4096MB etc.)

    Allocating RAM within ATLauncher Java/Minecraft settings on a specific instance

  • Curseforge offers a duo of RAM allocation methods. The initial approach involves configuring the launcher’s default RAM, which acts as a universal setting for all profiles unless overridden by individual profile preferences. Alternatively, one can assign RAM to a particular profile through the profile settings.

    Allocating RAM in the General Settings

  • Click the gear icon in the lower left to open the settings.

    Accessing the general CurseForge launcher settings

  • In the settings menu, select Minecraft under Game Specific Settings.

  • Scroll down to locate the Allocated Memory slider beneath the Java Settings.

  • Move the Slider to allocate RAM. The slider is in megabytes, a gigabyte is approximately 1024 megabytes. (i.e. 1GB = 1024MB, 4GB = 4096MB etc.)

    Setting the default memory allocation in the CurseForge launcher

  • Allocating more RAM to a Specific Profile

  • Navigate to the My Modpacks category in the CurseForge launcher.

  • Click on anywhere on the profile tile you want to select except for the play button.

    Accessing the profile page in the CurseForge launcher

  • Open the 3-dot options menu next to the play button and click on “Profile Options”.

    Accessing the profile specific options in the CurseForge launcher

  • Deselect the box for utilizing system memory settings.

  • Move the Slider to allocate RAM. The slider is in megabytes, a gigabyte is approximately 1024 megabytes. (i.e. 1GB = 1024MB, 4GB = 4096MB etc.)

    Changing profile specific RAM allocation in the CurseForge launcher

  • Access the Library category within the FTB application.

  • Hover over an installation and click anywhere on that installation except the play button.

    Accessing the library and profile page for an instance in the FTB App

  • On the following screen, click on settings.

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    Accessing the instance settings in the FTB App

  • Move the Slider to allocate RAM.

    Allocating more memory to an instance in the FTB App

  • In the top right corner, click on Launcher Options.

    Accessing the settings in the Technic Launcher

  • Select Java Preferences.

  • Use the Memory dropdown to select how much RAM to allocate.

    Allocating memory in the Java Settings in the Technic Launcher

  • To allocate more memory to a specific instance, simply right-click on it.

  • Click Edit Instance.

    Accessing instance settings within MultiMC

  • Click on the Settings option.

  • Please tick the box adjacent to Memory.

  • Change the value for Maximum Memory Allocation to allocate more RAM.

    Allocating more memory in the MultiMC instancesettings

  • Click the options symbol in the upper right corner.

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