FermiumASM

FermiumASM

1.12.2 Optimization and improvements mod, forked from NormalASM

by
117.6K Downloads
forgeoptimizationutility
Rent Server with this Mod

About this Mod

IMPORTANT:

FermiumASM is a fork of NormalASM by skmedix licensed LGPLv2.1;

Which is an updated fork of NormalASM by mirrorcult licensed LGPLv2.1;

Which is a fork for rebranding to remove "questionable" content of L**iASM/CensoredASM by Rongmario licensed LGPLv2.1.

As with the original and the forks, FermiumASM makes multiple improvements, optimizations, and bug fixes to Minecraft, including but not limited to:

  • Optimizing RAM usage, especially in larger packs.
  • Fixing multiple crashes, in Minecraft, Forge, and some other mods.
  • Multiple performance improvements.
  • Crash handling to allow you directly upload crash reports to mclo.gs.

While the NormalASM forks only rebranded and stayed updated with CensoredASM, FermiumASM on the other hand does more significant changes to its function:

  • Refactored and modified to use and depend on FermiumBooter, an alternative to mixin loading, replacing its dependency on MixinBooter.
  • Removes internal Spark profiling as it is both incompatible with, and superseded by, the updated fork Spark Unforged, allowing for better profiling.
  • Removes the chance to pick a random author to blame in a crash report.
  • Rebranded user-facing and logging branding, including icon and url, to FermiumASM, and updated authors to recognize fork authors.

As with the original, FermiumASM is incompatible with VanillaFix and TexFix as their functionalities have been improved and added directly to the mod.

FermiumASM does not depend on MixinBooter, it now depends on FermiumBooter.

FermiumASM has been tested as working within an active modpack and should perform accurately as a replacement to the forks or original mod.

Due to the changes, if you have any issues, please report them to the linked issue tracker at the top for FermiumASM, not the original mod.

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Available Versions

FermiumASM 5.31release
MC 1.12.2forge
March 11, 2026
FermiumASM 5.28release
MC 1.12.2forge
April 5, 2025
FermiumASM 5.23release
MC 1.12.2forge
May 15, 2024
FermiumASM 5.22release
MC 1.12.2forge
April 21, 2024
FermiumASM 5.21release
MC 1.12.2forge
February 18, 2024

How to Install FermiumASM 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 "FermiumASM". 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

FermiumASM 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 FermiumASM compatible with forge?

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

Server lagging with FermiumASM – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if FermiumASM 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 FermiumASM with just one click on your server.

Recommended RAM
4 GBfrom €5.2/mo
Minimum 3 GB | per 8 players
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
GNU Lesser General Public License v2.1 only
Server-side
Required

Supported Versions

1.12.2