Compatible Optimisations

Name: Compatible Optimisations
Price: 8 EUR
Author: AaroTron9000

Quicker than the competition! Compatible Optimisations, a well-researched game optimisation pack designed as a base to add mods upon whilst staying compatible. Also works as a vanilla optimisation pack. Now updated to 1.21!

by AaroTron9000

791 Downloads

0 Followers

fabricMC 1.21.11lightweightmultiplayeroptimization

Rent Compatible Optimisations Server

About this Modpack

Compatible Optimisations

This is Compatible Optimisations, a modpack designed to optimise your minecraft client whilst allowing you to install and play with whichever mods you wish.

Features

Performance:
This modpack gives you highly enhanced game performance better than the likes of OptiFine thanks to a combination of great performance enhancing mods, notably Sodium, Lithium and Indium.

Fully Compatible:
Whilst being highly optimised for performance, this modpack manages to stay completely compatible with all the mods you want to use. This is thanks to all the mods being fully open source allowing for high compatibility.

Better for everyone:
This modpack is designed to enhance your performance on whatever device you are using from a complete potato to an overclocked beast you will still feel a giant performance leap.

Built for Fabric:
This modpack has been created using the Fabric API. The fabric API is easy to use, lightweight, supports lots of mods, and is built to be easy to use by modders.

Fully Client-Side:
This modpack is fully client-sided. This means that this modpack and all of its performance enhancements can be used on any vanilla server you want!

Available Versions

Compatible Optimisations 1.21.11release

MC 1.21.11fabric72 downloads

January 1, 2026

Compatible Optimisations 1.5.0release

MC 1.21.10fabric57 downloads

October 23, 2025

Compatible Optimisations 1.4.0release

MC 1.21.8fabric60 downloads

August 7, 2025

Compatible Optimisations 1.3.0!release

MC 1.21.4fabric83 downloads

December 28, 2024

Compatible Optimisations 1.2.0release

MC 1.21fabric143 downloads

June 17, 2024

How to Set Up a Compatible Optimisations Server

Order Server

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

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "Compatible Optimisations" 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

Compatible Optimisations 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 Compatible Optimisations 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 Compatible Optimisations 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.

Compatible Optimisations 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.