Uranium

Uranium

Client-side Optimization and performance improving Modpack (i know there are many but give me a try!)

by skruffied
1.5K Downloads
0 Followers
fabricMC 1.21.4lightweightoptimization

About this Modpack

Introducing Uranium – A Minecraft Modpack for awesome Performance and Smooth Gameplay!

(I know there are many perfomance modpacks, but give it a try! :D)

Uranium is a modpack designed to optimize your Minecraft experience by reducing
load times and improving performance.
I tried to include as few mods as possible ^^


Key Features:

1.
No In-Game Branding: I kept Uranium out of your game :)

2.
Performance-Enhancing Mods: Uranium integrates a range of mods aimed at boosting performance, reducing lag, and increasing frame rates. Mods like Sodium, Chunky, and Lithium are great examples.

3.
Reduced Load Times: Tired of those endless loading screens? Uranium speeds up world generation and starting time of Minecraft.

4. Memory Optimization: Uranium includes mods that optimize memory usage, prevent leaks, and smartly allocate resources, ensuring smooth gameplay even on less powerful systems.

5. Visual Enhancements: Download Shaders!!! Uranium includes Sodium and Iris that add the ability to apply shaders and graphical effects for beautiful visuals!

6. Compatibility and Stability: Built with compatibility and stability in mind, Uranium’s mods are tested to work together, minimizing conflicts and crashes. Enjoy a Miencraft in a stable, reliable environment.


Say goodbye to performance issues, long load times, and stuttering gameplay. With Uranium, dive into your Minecraft adventures with enhanced performance, quicker load times, and a butter-smooth experience.

Available Versions

Uranium 3 for Minecraft 1.21.4release
MC 1.21.4fabric71 downloads
December 29, 2025
Uranium 2.3 for Minecraft 1.21.1release
MC 1.21.1fabric263 downloads
November 25, 2024
Uranium 2.0.1 for Minecraft 1.20.4release
MC 1.20.4fabric154 downloads
February 15, 2024
Uranium 2.0 for Minecraft 1.20.4release
MC 1.20.4fabric163 downloads
December 30, 2023
Uranium 1.2.1 for Minecraft 1.20.2release
MC 1.20.2fabric143 downloads
November 3, 2023

How to Set Up a Uranium Server

1

Order Server

Choose at least 4 GB RAM (6 GB recommended for Uranium). Based on player count: per 8 players.

2

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "Uranium" and click "Install". The fabric loader and Minecraft 1.21.4 are configured automatically.

3

Start Server & Play

Start the server – all mods are loaded automatically. Share the server IP with friends and play together!

Frequently Asked Questions

Uranium server crashes or won't start – what to do?

Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 6 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.

How much RAM does a Uranium server really need?

Minimum 4 GB, recommended 6 GB for stable performance. per 8 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €8/month).

Can I add custom mods to Uranium without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.4). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.

Uranium server lagging – performance tips

1) Increase RAM to 6 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.

Rent Uranium Server

Start your own server with automatic modpack installation.

Recommended RAM:
6 GB(min. 4 GB)
From 8.00 / month
Create Server Now
1-Click Modpack Install
NVMe SSD Storage
DDoS Protection included
Automatic Backups

Details

License
GNU General Public License v3.0 only
Server-side
Optional
Client-side
Required

Supported Versions

1.21.41.21.11.20.41.20.21.20.11.19.4

Start your Uranium Server now

From €8.00/month with 6 GB RAM for the best performance.

Configure Server →