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modpack

RMC OptimizationMinecraft modpack for 1.21.11

Boost your Minecraft performance with this Fabric mod pack. It increases FPS, reduces lag, and is easy to install. Works on all PC specs.

client onlynewest supported release 1.21.11Optimization
Latest version
1.0.4
Minecraft
1.20.1 to 1.21.11
Java
Java 21+
Loader
Fabric
Licence
LicenseRef-All-Rights-Reserved
Downloads
531
Updated
14 d ago
Available on
Modrinth

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

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

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.11Fabric21+declared9 Dec 2025
1.21.1Fabric21+declared8 Aug 2024
1.20.1Fabric17+declared12 Jun 2023

Download

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

Most recently published release

1.0.4release29 Oct 2026

1.21.11 RMC 1.0.4.mrpack · 8 KB · for 1.21.11 · Fabric

Download this release
766baeb4d609…
Older versions4
  • 1.0.322 Sept 20261.21.116 KBa66e5932370b…Get
  • 1.0.229 Mar 20261.21.115 KB78 downloads3560f6973138…Get
  • 1.0.119 Mar 20251.21.1992 B167 downloadsd7456b112112…Get
  • 1.0.031 Dec 20241.20.11 KB107 downloads9a274008efae…Get

Frequently asked

Does RMC Optimization work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version RMC 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 RMC Optimization support?

Everything the author has declared, from 1.20.1 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install RMC Optimization on the client or the server?

The client only. There is nothing to install on the server side. That is the author's declared design, not a guarantee for every server: one running anti-cheat or missing a counterpart mod can still object.

Which platform or loader does RMC Optimization support?

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

Which Java version do I need for RMC Optimization?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is RMC Optimization under?

LicenseRef-All-Rights-Reserved, 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 RMC Optimization?

Use a launcher that imports packs, such as Prism Launcher, the Modrinth App or the CurseForge app, and open the pack file with it. The launcher installs the right loader and mods for you; installing a pack's mods by hand is the error-prone way.

Where do I download RMC Optimization safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

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

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Details from Modrinth, where the author last updated it on 29 Oct 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .