- Loaders
- FabricNeoForgeForgeQuilt
- Downloads on Modrinth
- 164M
- Followers on Modrinth
- 16.7K
- versions
- 71
- Updated
- March 24, 2026Mar 24
- Published
- in 2021
At a glance
Works both in the game and on the server — install where you need it
This mod reduces the memory usage of Minecraft in a few different ways. A high-level technical description of the changes is available here.
The amount of memory saved will depend on the pack. In version 2.5.9 of All Of Fabric 3 it reduces the RAM usage (heap size) from 1,792 MB to 984 MB. For comparison the same setup with Hydrogen instead of FerriteCore uses 1,335 MB.
These values were measured after generating a world with a fixed seed and waiting for two minutes. The project picture is a cropped version of this picture.
FAQ
Should I install this on the server or just on the client?
Some optimizations are client-side only, but there are some rather high-impact optimizations that are relevant on the server too. So you should install it on both sides.
Is this compatible with [other mod]?
Most likely yes. The only exception is Hydrogen, which is compatible with all recent FerriteCore versions on Minecraft versions where Hydrogen is officially released. This means that 1.18+ builds are not compatible with Hydrogen, since it has been officially archived and won't receive any releases on these versions.
FAQ
How to install FerriteCore?
Install Fabric for your Minecraft version, download FerriteCore for the same version and loader, put the file into the mods folder and launch the game with the loader profile.
Which Minecraft versions does FerriteCore support?
FerriteCore has builds for Minecraft 1.16.5–1.20.2, 1.20.4–1.21.1, 1.21.3–26.3.
Is FerriteCore needed on the server?
Works on either side — install it in the game, on the server, or both
