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[UO]Ultramodern optimization - UOMinecraft modpack for 1.21.1

Network high optimization High stability Out of the box Compatible stability

newest supported release 1.21.1MultiplayerSmall LightTech
Latest version
Ultramodern optimization-2.5.6
Minecraft
1.12.2 to 1.21.1
Java
Java 21+
Loaders
Forge, NeoForge
Licence
not stated
Downloads
6.5k
Updated
2 mo ago
Available on
CurseForge
Space NodeOur hosting

Host [UO]Ultramodern optimization - UO servers

One click and [UO]Ultramodern optimization - UO is installed with the right loader, on hardware built for it.

  • 1.21.1
  • Forge
  • NeoForge
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

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

Minecraft versions

Every version [UO]Ultramodern optimization - UO declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.1Forge, NeoForge21+declared8 Aug 2024
1.20.1Forge, NeoForge17+declared12 Jun 2023
1.16.5NeoForge, Forge8+declared14 Jan 2021
1.12.2Forge, NeoForge8+declared18 Sept 2017

Download

From [UO]Ultramodern optimization - UO’s own host. Nothing is re-hosted here.

Browse 29 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • NeoForge

    Ultramodern optimization-0.4 · 18 Jul 2026 · Ultramodern optimization-0.4-0.4.zip

    Get NeoForge

Most recently published release

Ultramodern optimization-2.5.6release27 Aug 2026

Ultramodern optimization-2.5.6-2.5.6.zip · 0.1 MB · for 1.20.1 · Forge

Download this release
e8961d975ba5…
Older versions24
  • Ultramodern optimization-0.418 Jul 20261.21.112.1 MB21 downloads63e9e2944aa2…Get
  • Ultramodern optimization-2.5.516 Jul 20261.20.10.1 MB33 downloads805402426ecf…Get
  • Ultramodern optimization-2.5.49 Jun 20261.20.10.1 MB56e79c9d6ccf…Get
  • Ultramodern optimization-0.310 Apr 20261.21.15.2 MB12 downloadsa9f885c47444…Get
  • Ultramodern optimization-2.5.2-hotfix10 Apr 20261.20.15.1 MB24532cdbad41…Get
  • Ultramodern optimization-2.5.24 Apr 20261.20.15.1 MB30 downloadsa7c09ed57d01…Get
  • Ultramodern optimization-2.5.124 Feb 20261.20.115.3 MB417 downloads6b807ce9c50d…Get
  • Ultramodern optimization-2.522 Jan 20261.20.15.6 MB12 downloads5a66ae753095…Get
  • Ultramodern optimization-2.46 Jan 20261.20.140 KB149 downloadsb33f413ffa69…Get
  • Sodium version-0.230 Nov 20251.21.111.5 MB155 downloads3ea388d7dabc…Get
  • Ultramodern optimization-2.330 Nov 20251.20.15.1 MB73b7d9963fc6…Get
  • Ultramodern optimization-2.228 Nov 20251.20.157.1 MB25 downloadsbfef6c78a961…Get
  • Ultramodern optimization-2.123 Nov 20251.20.157.1 MB39 downloadsfbeb6d0a5b8f…Get
  • Ultramodern optimization-2.04 Nov 20251.20.157.0 MB122 downloads4395124e7896…Get
  • Ultramodern optimization-1.93 Nov 20251.20.157.0 MB20 downloadsfa6041dd46ff…Get
  • Cleanroom version-0.13 Nov 20251.12.234.2 MB7398749b2aa0…Get
  • Rubidium version-0.1-1.16.5Forge2 Nov 20251.16.54.8 MB11 downloadscb6d003bbf4b…Get
  • Sodium version-0.12 Nov 20251.21.163.2 MB8ad282527994…Get
  • Embeddium version-0.12 Nov 20251.21.163.2 MBcfe5a8c7c6ce…Get
  • Ultramodern optimization-1.81 Nov 20251.20.157.0 MB14 downloads4bf13e6f7074…Get
  • Ultramodern optimization-1.726 Oct 20251.20.158.6 MB12 downloads4254e1d7d905…Get
  • Ultramodern optimization-1.624 Oct 20251.20.158.6 MB18 downloads2f3d737723d3…Get
  • Ultramodern optimization-1.522 Oct 20251.20.156.9 MB14 downloads44badd3cfb5d…Get
  • Ultramodern optimization-1.420 Oct 20251.20.156.9 MB13 downloads6dfd15025e16…Get

Frequently asked

Does [UO]Ultramodern optimization - UO work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version [UO]Ultramodern optimization - UO 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 [UO]Ultramodern optimization - UO support?

Everything the author has declared, from 1.12.2 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does [UO]Ultramodern optimization - UO support?

Forge, NeoForge. 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 [UO]Ultramodern optimization - UO?

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.

How do I install [UO]Ultramodern optimization - UO?

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 [UO]Ultramodern optimization - UO safely?

Start with the author's page on CurseForge, 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.

MAX FPS: Optimized🚀 MAX FPS WITHOUT UNNECESSARY MODS! Only 16 optimization mods - NOTHING EXTRA! ✅ ALL MAJOR VERSIONS ⚡ INSTALLS ON ANY LAUNCHER! (Guide below)Simply Optimized ReloadedAn unofficial port of Simply Optimized built to support every major mod loader and stay current with the newest versions of Minecraft.香草精华 Vanilla EssenceFaithful to the origional. Better vanilla experience without any new blocks or mobsOptimumFuse[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.Photon OptimizationMinecraft optimization framework prioritizing performance, simplicity, and compatibility. 1.7.10-26.1.2 across Fabric, Forge, NeoForge, and Quilt!Extreme Optimization!Threaten your game to run faster

Details from CurseForge, where the author last updated it on 27 Aug 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? .