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modpack

Extreme Optimization!Minecraft modpack for 1.21.4

Threaten your game to run faster

newest supported 1.21.4OptimizationLightweightMultiplayer
Latest version
C1.21.1NF.2
Minecraft
1.12.2 to 1.21.4
Java
Java 21+
Loaders
Fabric, NeoForge, Quilt, Forge
Licence
CC-BY-NC-4.0
Downloads
37.3k
Updated
3 mo ago
Available on
Modrinth
Space NodePartner

Host Extreme Optimization! servers

One click and Extreme Optimization! is installed with the right loader, on hardware built for it.

  • 1.21.4
  • Fabric
  • NeoForge
  • Quilt
  • Forge
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Extreme Optimization! declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.4Fabric, NeoForge, Quilt, Forge21+declared3 Dec 2024
1.21.1Fabric, Quilt, NeoForge, Forge21+declared8 Aug 2024
1.20.2Fabric, Quilt, NeoForge, Forge17+declared20 Sept 2023
1.20.1Forge, Quilt, NeoForge, Fabric17+declared12 Jun 2023
1.19.4NeoForge, Fabric, Forge, Quilt17+declared14 Mar 2023
1.19.2Fabric, Quilt, NeoForge, Forge17+declared5 Aug 2022
1.18.2Forge, Quilt, NeoForge, Fabric17+declared28 Feb 2022
1.16.5Forge, Quilt, NeoForge, Fabric8+declared14 Jan 2021
1.12.2Forge, Quilt, NeoForge, Fabric8+declared18 Sept 2017

Download

From Extreme Optimization!’s own host. Nothing is re-hosted here.

All 29 releases
C1.21.1NF.2beta9 Jun 2026

C1.21.1NF.2.mrpack · 0.0 MB · for 1.21.1

Download latest
18217b4c24b1…
Older versions24
  • CS1.12.2FJ89 Apr 20251.12.20.7 MB3.2k downloads58a338c5b595…Get
  • CS1.12.2FJ21+9 Apr 20251.12.20.7 MB513 downloads065df010fa44…Get
  • S1.12.2FJ88 Apr 20251.12.20.2 MB183 downloadsad04fd7c0e50…Get
  • S1.21.1NF.210 Mar 20251.21.10.1 MB1.5k downloadsc7e694f9e76e…Get
  • S1.21.4NF10 Mar 20251.21.40.0 MB547 downloads215ad4aefd57…Get
  • C1.21.4NF10 Mar 20251.21.40.0 MB198 downloads230360295e0d…Get
  • C1.21.1NF25 Feb 20251.21.10.0 MB805 downloadsa83508d02e3a…Get
  • S1.21.1NF19 Feb 20251.21.10.1 MB600 downloads4f8453651e54…Get
  • 1.20.2ForgeTPLRE30 Nov 20231.20.20.0 MB3.9k downloadsded13eae3f75…Get
  • 1.20.2ForgeVLRE30 Nov 20231.20.22.2 MB291 downloadse28af254629c…Get
  • 1.20.2FTPLRE28 Nov 20231.20.20.0 MB433 downloadse7ec56d2b1d7…Get
  • 1.20.1QTPLRE5 Aug 20231.20.10.0 MB2.7k downloadsbe78d5a7e9b1…Get
  • 1.12.2ForgeVL3.02 Aug 20231.12.26.8 MB8.1k downloadse19d2ff27c2d…Get
  • 1.12.2ForgeTPL3.02 Aug 20231.12.24.0 MB1.5k downloads4825f473ee48…Get
  • 1.19.4QTPL18 May 20231.19.40.0 MB732 downloads2e9267c8daf2…Get
  • 1.19.4QVL18 May 20231.19.412.0 MB298 downloads67ffc631d124…Get
  • 1.12.2ForgeTPL2.021 Mar 20231.12.22.1 MB2.3k downloads0afc80f69f66…Get
  • 1.12.2ForgeVL2.021 Mar 20231.12.25.1 MB717 downloads21c1c7460872…Get
  • 1.12.2ForgeVL20 Nov 20221.12.24.9 MB1.1k downloads66a428d1d737…Get
  • 1.12.2ForgeTPL20 Nov 20221.12.21.7 MB694 downloadscb0480a02942…Get
  • 1.16.5FTPL20 Nov 20221.16.50.1 MB2.5k downloads24e1259ed27d…Get
  • 1.16.5FQVL20 Nov 20221.16.57.3 MB1.3k downloadsa51181d4aa21…Get
  • 1.18.2FTPL19 Nov 20221.18.20.2 MB675 downloads295deed9588c…Get
  • 1.18.2FQVL19 Nov 20221.18.212.2 MB404 downloadse0e4e53d00cc…Get

Frequently asked

Does Extreme Optimization! work on Minecraft 1.21.4?

Yes. 1.21.4 is the newest Minecraft version Extreme Optimization! declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Extreme Optimization! support?

Everything the author has declared, from 1.12.2 up to 1.21.4. The full list is in the table above, with the Java runtime each version needs next to it.

Which loader does Extreme Optimization! need?

Fabric, NeoForge, Quilt, Forge. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Extreme Optimization!?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the modpack itself.

What licence is Extreme Optimization! under?

CC-BY-NC-4.0, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Extreme Optimization!?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the modpack and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Extreme Optimization! safely?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

Re-ConsoleA continued Legacy Console Edition experience, expanded upon with modern Java Edition content and QoL! (An Official Legacy4J Project)MAX FPS: Optimized🚀 MAX FPS WITHOUT UNNECESSARY MODS! Only 16 optimization mods - NOTHING EXTRA! ✅ ALL MAJOR VERSIONS ⚡ INSTALLS ON ANY LAUNCHER! (Guide below)PacktrixPre-packed Official Modpack containing Patrix Resource Pack for easy install using Fabric/Quilt.Simply Optimized ReloadedAn unofficial port of Simply Optimized built to support every major mod loader and stay current with the newest versions of Minecraft.OptimumFuse[1.21.5] [Fabric📜] An open-source modpack that improves the game's performance and visuals, inspired by OptiFine, while staying true to the vanilla Minecraft experience.ElixirA well-researched performance & optimization modpack to make the game run smoother! With shader & Fresh Animations support. 26.3 rc1 ✔

Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .