I didn't know you could set that to a percentage. Huh. Maybe I should try that. And a little tip for allocating RAM: Don't let Java decide the values. It will ALWAYS set the max to a gig. And does anyone know how to get rid of that godawful Mapwriter mod and swap it with Journeymap? It doesn't show up in the mods folder so I can delete it. It cuts my FPS like nothing else, and the Utopia dimension is unplayably laggy with it on. Turning down the mod's settings helped a bit, but trying to install a version of Journeymap I had sitting around didn't work. Apparently CC's version of Forge is too old for it.