FPSBOOST Build for Minecraft 1.21.11
FPSBOOST is a set of optimizations for Minecraft that improves performance and increases FPS in the game. Optimizes settings, reduces lag and improves gameplay smoothness, making the game more comfortable and enjoyable.
- downloads
- 53 downloads
- views
- 227 views
- Updated
- Updated 22.10.2026
- 1.21.11
Fabric
FPSBOOST: Boost your performance in Minecraft!
Mod pack on Modrinth
Want to make your Minecraft adventures even more exciting and incredibly smooth? Then welcome to the world of FPSBOOST! Our build offers a unique gaming experience, preserving the original mechanics and spirit of Minecraft, but with one important improvement - the most optimized gameplay.
What makes FPSBOOST so special?
🚀 Extra Performance: Feel the difference with our optimized settings. Get the most out of your hardware to play Minecraft at a new level of smoothness.
⚡️ Custom JVM arguments: We have prepared special Java Virtual Machine settings for you to ensure maximum use of your computer's resources and minimize lag.
🌐 Accessible to everyone: FPSBOOST is designed for everyone, regardless of your computer. We want every player to be able to enjoy the game without the headaches of poor performance.
JVM custom arguments:
-XX:+UseG1GC -Dsun.rmi.dgc.server.gcInterval=2147483646 -XX:+UnlockExperimentalVMOptions -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Or for 8 GB or more RAM: -XX:+UseShenandoahGC -XX:+UnlockExperimentalVMOptions -XX:+AlwaysPreTouch -XX:+UseStringDeduplication -Dfml.ignorePatchDiscrepancies=true -Dfml.ignoreInvalidMinecraftCertificates=true -XX:-OmitStackTraceInFastThrow -XX:+OptimizeStringConcat -Dfml.readTimeout=180
How to install FPSBOOST
With Millida Launcher
Install Millida Launcher
The launcher is free: download it at millida.net/launcher and sign in with any nickname.
Click “Install” on this page
The launcher opens and installs the modpack for Minecraft 1.21.11 on Fabric automatically.
Launch the game
A profile with it appears in the launcher: click “Play”.
Manually
Download the modpack archive
In the version list above, pick the file Fabric - 1.21.11 - 2.8.4.zip (6.1 MB).
Import it into a launcher
A launcher that supports modpacks (Millida Launcher, Prism) takes the archive via “Add modpack”, then “From file”. No need to unpack it yourself.
Allocate memory
Modpacks need more memory than the plain game: set 4–6 GB in the profile settings.
On a server
Or use the “To hosting” button
On Millida Hosting, the button at the top of the page uploads the file to your server and restarts it for you.
Players install the same modpack
To join the server, every player needs the same modpack version.
Minecraft 1.21.11 runs on Java 21: with a different Java version the game may close right after launch.
Versions
With dependencies
| Minecraft | Loader | File | Date | Actions |
|---|---|---|---|---|
| 1.21.11 | Fabric | Fabric - 1.21.11 - 2.8.46.1 MB 53 |
FAQ
Which Minecraft versions does FPSBOOST work on?
Only Minecraft 1.21.11: there are no files for other versions.
Is FPSBOOST for Forge or Fabric?
Only for Fabric: 1.21.11.
Which Java does FPSBOOST need?
Minecraft 1.21.11 runs on Java 21. If the game closes right after launch, the usual cause is the wrong Java version in the profile settings.
Where can I download FPSBOOST safely?
On this page: the file Fabric - 1.21.11 - 2.8.4.zip (6.1 MB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: 8590fd8e795e1207f24a495e02643d3e2284d4c4.
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