
Opti-Basic Fabric
A basic optimisation modpack for Fabric. [1.20.1-1.21.11]
Screenshots

About this Modpack
What Is Opti-Basic Fabric?
This is a modpack that I made to prioritise optimisation. It has some basic optimisation mods and is made for people that just want performance without much want for shaders or a better look.
What's Inside
- Cloth Config API
A config screen API - Concurrent Chunk Management Engine
A mod designed to improve the chunk performance of Minecraft - Cull Leaves
Culls leaf blocks - Debugify
Fixes some bugs on the Minecraft bug tracker - Dynamic FPS
Reduces resource usage while Minecraft is idle - Enhanced Block Entities (v1.0.0-v1.0.10)
Reduces FPS lag with block entities - Entity Culling
Skips rendering things that you can't see - Fabric API
A library with essential hooks for fabric mods - Ferrite Core
Reduces the memory usage of Minecraft - Immediately Fast
Speeds up immediate mode rendering - Lithium
No-compromises game logic/server optimization mod - Modern Fix (v1.0.0-v1.0.10) and replaced with ModernFix-mVUS
All-in-one mod that improves performance, reduces memory usage, and fixes many bugs - More Culling
Changes how multiple types of culling are handled - Noxesium
Improves client performance on large multiplayer servers - Sodium
A modern rendering engine for Minecraft - Sodium Extra
Adds some optimisation features that aren't in sodium - Starlight (v1.0.0-v1.0.3)
Rewrites the lighting engine to fix lighting performance and lighting errors - Yet Another Config Lib
A configuration library for Minecraft
Why Use Opti-Basic?
This mod is for performance. If you just want good performance with no shaders (but the option to add more later), then this mod is for you.
Reviews: This modpack is always progressing and it would be great if you could give some feedback! Please submit a ticket in the discord and give us feedback on anything we could do better in the future. All feedback is welcomed.
Available Versions
How to Set Up a Opti-Basic Fabric Server
Order Server
Choose at least 4 GB RAM (6 GB recommended for Opti-Basic Fabric). Based on player count: per 8 players.
Install Modpack in Dashboard
Open the modpack browser in the dashboard, search for "Opti-Basic Fabric" 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
Opti-Basic Fabric 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 Opti-Basic Fabric 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 Opti-Basic Fabric 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.
Opti-Basic Fabric 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.
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Supported Versions
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