Modrinth Launcher

1. From the Modrinth launcher, select the Settings button.

2. Under Java memory, drag the slider or input the desired amount.

Prism Launcher

1. From the Prism Launcher, make sure to select the right Instance by clicking on it.

2. Select Edit on the left.

3. Then select the Settings tab on the right.

4. Check the Memory box, and set the Minimum and Maximum Memory allocation to the value needed.

Minecraft Launcher

1. Open the Launcher and verify you’re on the Java Edition section of the launcher.

2. Click on the installations tab and find which installation you want to allocate more RAM to.

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

4. Click on the More Options text.

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

TLauncher

1. From the TLauncher, select the Settings button in the bottom right corner.

2. Click on the Settings text.

3. In the Minecraft settings tab under Selection Java, drag the slider or input the desired amount.

4. Then click Save.

Feather Launcher

1. From the Feather launcher, select the Settings button in the top right corner.

2. In the right corner under allocated ram, drag the slider or input the desired amount.

Lunar Client

1. From the Lunar Client launcher, select the Settings button in the bottom left corner.

2. Under the GAME tab, drag the slider or input the desired amount.

ATLaucher

1. From the ATLauncher, select the Settings tab on the right.

2. In the tab at the top select Java/Minecraft.

3. Then change the Maximum Memory/Ram to needed.

4. Finely click save down at the bottom.

FTB Launcher

1. From the FTB launcher, select the Settings button on the left.

2. Select the Instance Default tab and scroll down to Java

3. Drag the slider or input the desired amount.

Credits

• @TVcraft01 contributing to this wiki page