How to make Minecraft use more ram So I recently tried to improve my Minecraft FPS by allocating more ram to it from 2G to 3G. However, I realized that Minecraft was only using at most 800 megabytes at a time. I tried turning off power management and tweaking the garbage collection and stuff like that but Minecraft refused to use more ram. Is there a way to make it use more ram? I’m running on a I5 with integrated graphics on a Linux system.