Optidium

Name: Optidium
Price: 8 EUR
Author: DarkArtist

This modpack aims to remake OptiFine on Fabric using sodium and keeping things like zoom and dynamic lights!

by DarkArtist

495 Downloads

0 Followers

fabricMC 1.21.11lightweightmultiplayeroptimization

Rent Optidium Server

Screenshots

About this Modpack

With Optidium we aim to remake the OptiFine experience with sodium. We aim to make it so you will still have your OptiFine cape, your zoom and dynamic lights while making it so it all runs on fabric. It is in my opinion of the best modpacks out there to do this.

Available Versions

Optidium Fabric 1.0.0release

MC 1.21.11fabric495 downloads

January 17, 2026

How to Set Up a Optidium Server

Order Server

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

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "Optidium" and click "Install". The fabric loader and Minecraft 1.21.11 are configured automatically.

Start Server & Play

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

Frequently Asked Questions

Optidium 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 Optidium 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 Optidium without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.11). 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.

Optidium 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.