Sodium: Rendering optimization, significantly increases FPS.
Lithium: Improved game logic.
FerriteCore: Reduced memory utilization.
Starlight: Rewrites the lighting system to improve performance.
Entity Culling: Skips rendering of objects not visible to the player.
Iris Shaders: Shader pack loader for Minecraft.
Dynamic FPS: Reduce resource usage while Minecraft is in the background, idle, or on battery.
LazyDFU: Defers unnecessary initialization work so that it is only performed if required
Threadtweak: Improve and tweak Minecraft CPU scheduling
ImmediatelyFast: Improves the immediate mode rendering performance of the client.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Downloads as Extreme Optimized + 1.mrpack
- Download size: 7 KB
- Download link checked 10 Sept 2026 — working
These come from our own check of the pack file, not from the source page.