

A window will open in which you will be able to see how much RAM you have available. Press the WINDOWS and PAUSE keys simultaneously.

You will need to determine the maximum amount of RAM you can allocate to Minecraft based on your computer’s capabilities. Hover over the installation you want to allocate more RAM to and click on the more options (3-dot menu) and click on edit. Click on the installations tab and find which installation you want to allocate more RAM to.
