




The Boost FPS Modpack for Fabric is a powerful performance enhancement tool designed specifically for Minecraft players using the Fabric modding framework. This modpack integrates a collection of performance-boosting mods to significantly increase FPS (frames per second), resulting in smoother gameplay, even on lower-end or older hardware.
Working seamlessly with the Fabric API, the modpack includes mods like Lithium, Phosphor, and Starlight—each focused on optimizing specific aspects of the game. Lithium optimizes the game's core mechanics and entities, reducing unnecessary CPU load, while Phosphor improves Minecraft’s lighting engine for faster chunk loading and smoother world rendering. Starlight focuses on improving the block lighting system, reducing lag related to block updates.
Additionally, OptiFabric, an OptiFine-like mod for Fabric, is included, enabling more fine-tuned graphical settings such as adjusting render distance, quality, and visual effects. The modpack also incorporates memory and thread optimizations, further boosting performance.
This combination of mods works together to streamline Minecraft’s performance, reducing lag and stuttering, while allowing users to maintain a good balance between visual quality and smooth gameplay. For anyone playing Minecraft on the Fabric platform looking to improve performance, this modpack is the ideal solution for better FPS and an overall enhanced gaming experience.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- 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 BY nsaOG 1.21.11.mrpack
- Download size: 4.5 MB
- Download link checked 28 Aug 2026 — working
These come from our own check of the pack file, not from the source page.