FermiumMixins

FermiumMixins

General purpose Minecraft and Minecraft mod tweaker and fixer

by
8.4K Downloads
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About this Mod

FermiumMixins is a general purpose mixin tweaker mod with multiple patches and tweaks to vanilla and various mods.

Sister mod of RLMixins (https://modrinth.com/mod/rlmixins) which focuses on patches for the modpack RLCraft.
Both mods can both be used at the same time and are fully compatible.

FermiumMixins currently contains over 170 different tweaks and patches for both Minecraft and mods, ranging from new features to performance improvements and bug fixes.
Every single tweak is toggle-able in FermiumMixins' config and includes simple mod compatibility warnings.
By default all config options are disabled for full compatibility with other mods.

Current Patched Mods:

Spoiler - Current Patched Mods:
  • AdvancedRocketry

  • AnvilPatchLawful

  • AstikorCarts

  • Battletowers

  • BetterFoliage/RLFoliage

  • BetterNether

  • BetterQuesting/BetterQuestingStandard

  • BiomesOPlenty

  • Bloodmoon

  • BountifulBaubles

  • CarryOn

  • Champions

  • Charm

  • ClassyHats

  • CodeChickenLib

  • CorpseComplex

  • CosmeticArmorReworked

  • DefiledLands

  • Disenchanter

  • DoomlikeDungeons

  • DramaticTrees

  • DynamicSurroundings

  • ElenaiDodge

  • FancyMenu

  • FirstAid

  • FoodExpansion

  • ForgottenItems

  • InfernalMobs

  • Inspirations

  • ItemPhysics

  • JEI

  • Locks

  • LostCities

  • LycanitesMobs

  • MoBends

  • Neat

  • NetherAPI

  • NoTreePunching

  • OpenTerrainGenerator

  • PotionCore

  • QualityTools

  • Quark

  • Reskillable

  • RoughTweaks

  • SereneSeasons

  • SimpleDifficulty

  • SpawnerControl

  • Switchbow

  • Toolbelt

  • Waystones

Report any issues to the Github.
Depends on FermiumBooter.

Need to get in contact with me, or want to support me? Click the badges below:

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Available Versions

1.0.13release
MC 1.12.2forge
May 26, 2026
1.0.12release
MC 1.12.2forge
February 19, 2026
1.0.5release
MC 1.12.2forge
August 27, 2025
1.0.4release
MC 1.12.2forge
July 19, 2025
1.0.3release
MC 1.12.2forge
July 18, 2025

How to Install FermiumMixins on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.12.2).

3

Install Mod

Open the mod browser in the dashboard and search for "FermiumMixins". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forge

Minecraft Versions

1.12.2

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

FermiumMixins server crashes on startup – what to do?

Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.12.2). You can switch loaders with one click in the panel.

Is FermiumMixins compatible with forge?

FermiumMixins officially supports forge for Minecraft 1.12.2. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with FermiumMixins – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if FermiumMixins consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install FermiumMixins with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
LicenseRef-All-Rights-Reserved
Server-side
Required

Supported Versions

1.12.2