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Unium project artwork

CurseForge · Minecraft mod

Unium

A powerful performance mod that accelerates world loading and chunk generation

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Unium release should I use?

Updated yesterday
Latest stable file unium-neo-1.21.1-1.1
Game version 1.21.1
Loader NeoForge

unium-neo-1.21.1-1.1 targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.

Where it goes

Is Unium required on the client, server, or both?

The project page does not say whether this file belongs on the client, dedicated server, or both.

Client Source doesn’t say
Dedicated server Source doesn’t say
Loader for this release NeoForge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

Understand client and server requirements Read the Minecraft installation guide

What else does unium-neo-1.21.1-1.1 need?

unium-neo-1.21.1-1.1. Change the file and its required mods may change too.

No extra mods listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional mods.

Before you install it

Add Unium without breaking your instance.

Built for unium-neo-1.21.1-1.1. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use unium-neo-1.21.1-1.1. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    This file does not list any required mods. Do not add a library just because a different file uses it.

  3. 03

    Put it on the correct side

    The project page does not say whether this file belongs on the client, dedicated server, or both.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside unium-neo-1.21.1-1.1. It opens that exact file at the source.

About this project

What does Unium add?

Unium speeds up world creation, world loading and exploration in modded Minecraft. It spreads chunk generation across CPU cores, helping worlds open sooner and terrain keep up as you explore. Tested on nine modpacks with 79–383 mods.

🎮Showcase:

Benchmarks: (lower is better)benchmarks

Benchmarks use the same hardware and seed, with alternating runs on a dedicated Forge 1.20.1 server (16 CPU threads). Original modpack means without Unium or C2ME. Lower is better; ranges show repeated runs, and bars use the upper end.

World creation measures time until ready to join; Unium finishes outer spawn chunks afterward (16–33 s total). Exploration runs at 60 blocks/s for 60 s, measuring the average number of ungenerated chunks among 289 nearby chunks. Worst tick is the longest server tick during that run. Craft to Exile 2 uses a fixed spawn biome.

Tests used Unium 0.12.0 (0.12.1 rechecks matched) and C2ME 0.2.0 / Forge 9.9.3. Results vary by pack and workload.

Drop Unium into your mods folder - it works automatically. Individual optimizations can be configured in config/unium-common.toml.

Project description from CurseForge.

Pick your setup

Unium by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

2 available setups

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

Unium versions and loaders

3 of 3 releases match

Looking for an older file? The official CurseForge project page is in Resources.

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