Modrinth · Minecraft modpack

[GUO]GLACIER_UItimate_Optimization

‌A modpack meticulously tuned by Bilibili creator 'Minecraft_冰河' enhances your Minecraft experience, balancing stunning visuals with peak performance to craft a cleaner, smoother adventure.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which [GUO]GLACIER_UItimate_Optimization release should I use?

Updated 8 months ago

Latest stable file [Fabric-1.21.1]GLACIER_UItimate_Optimization

Game version 1.21.1

Loader Fabric 0.17.3

[Fabric-1.21.1]GLACIER_UItimate_Optimization is a complete pack release for 1.21.1 with Fabric 0.17.3. Install it as its own launcher instance. If the creator publishes a separate server file, make sure it names this exact pack release. 44 mods in this pack file.

Pack setup

How should I set up [GUO]GLACIER_UItimate_Optimization for players and a server?

Use [Fabric-1.21.1]GLACIER_UItimate_Optimization as the pack version. Install the pack as its own launcher instance. The creator’s listing does not name a separate server file, so check the release notes before setting up a dedicated server. Do not upload the ordinary client folder blindly.

Client instance Install [Fabric-1.21.1]GLACIER_UItimate_Optimization

Dedicated server setup Match [Fabric-1.21.1]GLACIER_UItimate_Optimization

Pack loader Fabric 0.17.3

A pack is a matched client and server setup, not one mod with an install-side label. Keep its release, loader, manifest and overrides together.

Plan the server requirements Read the Minecraft installation guide

Referenced mods 44

Client only 21

Server only 7

Not labelled 16

These numbers come from the pack file you chose. “Not labelled” means we don’t know which side it belongs on—not that it is safe everywhere. The file count is not a RAM estimate.

What are the server requirements for [GUO]GLACIER_UItimate_Optimization?

[Fabric-1.21.1]GLACIER_UItimate_Optimization. Change the pack release and its contents or setup may change too.

44 mods in this pack file

The selected pack release is [Fabric-1.21.1]GLACIER_UItimate_Optimization. That file is for Minecraft 1.21.1 with Fabric 0.17.3. It contains 44 mod projects. The creator’s listing does not name a separate server file. Check their notes before using one, and do not upload an ordinary client folder or rebuild the pack mod by mod. A file count cannot tell us the right RAM, CPU or storage; size the server for the players and world you actually run.

About this project

What kind of pack is [GUO]GLACIER_UItimate_Optimization?

GLACIER Ultimate Optimization Modpack – Revitalize Your Minecraft Experience‌

Tired of lag stifling your creativity? Fed up with loading times draining your gaming passion? GLACIER Ultimate Optimization Modpack is specially crafted for players seeking seamless gameplay, breathing new life into Minecraft Java Edition through meticulously tuned optimization solutions.

‌Core Optimization Features‌

‌Enhanced Visual Fluency‌: Eliminates chunk loading stutters, and ensures buttery-smooth building.
‌Reduced Memory Usage‌: Significantly lowers RAM requirements, enabling smooth modded gameplay even on older PCs.
‌Revolutionary Loading Speed‌: Noticeably faster world generation—no more tedious startup waits.
‌Background Resource Management‌: Intelligently allocates system resources for flawless multitasking performance.

Ideal for users with:

Low-spec computers who want super high FPS.

Low-end machines using shaders.

Seeking high FPS in normal survival gameplay.

Project description from Modrinth.

Mods in [Fabric-1.21.1]GLACIER_UItimate_Optimization

Open any mod on Modpacks.ch to check its files and dependencies.

[C^2M 引擎] c2me-fabric-mc1.21.1-0.3.0+alpha.0.362.jar SHA-1 9beac89c94f36a342cb07cd9fcb42608bdd07771 · Modrinth version DSqOVCaF · Project link unavailable Side not labelled

[GPUBooster ／ GpuTape] GPUTape-1.18.x-1.21.1-1.0.0.jar SHA-1 c681f00781f20196c1b0d5078af722965384fb21 · Modrinth version ptxcOQyv · Project link unavailable Client only

[加速渲染重织版] acceleratedrendering-1.0.8-1.20.1-alpha-fabric.1.jar SHA-1 74e2fddfd12d8c0a9ba79443458ba6a4053b82b9 · Modrinth version pgm8CkON · Project link unavailable Client only

[文本占位符 API] placeholder-api-2.4.2+1.21.jar SHA-1 aa1b9a49f9f190dfe4825c502b150817dd2998c3 · Modrinth version U5bhVym2 · Project link unavailable Side not labelled

[树叶渲染优化] cullleaves-fabric-4.1.1+1.21.1.jar SHA-1 e1f494684b6ee9d3c8e50a34002c32331b3ffd0a · Modrinth version b3VxU7eO · Project link unavailable Client only

[疾速加载] dashloader-5.1.0-beta.8+1.21.1.jar SHA-1 9d87c0722dc86aceb75de6a1472aa89bf49190d5 · Modrinth version s8iJLvsS · Project link unavailable Client only

[输入法冲突修复] IMBlocker-5.4.6-fabric+1.17-1.21.8.jar SHA-1 ce1c4d59fe5f98d475c66832aa0a18c6a6795d1e · Modrinth version VlojK7Ty · Project link unavailable Client only

[铟] indium-1.0.35+mc1.21.jar SHA-1 1bf4b5db91f4e6d7a4f94fe2e96525d22df1cacb · Modrinth version Z8VpxxGh · Project link unavailable Client only

[预生成区块] Chunky-Fabric-1.4.23.jar SHA-1 6c8098fc0f124c7b6492de60db0108747f7f9821 · Modrinth version RVFHfo1D · Project link unavailable Side not labelled

alternate-current-mc1.21-1.9.0.jar SHA-1 b3dbc4fc4acfd98f3f6b62bbb4e641ed4df915e8 · Modrinth version 78P98rac · Project link unavailable Server only

async-fabric-0.1.8+alpha.1-1.21.1.jar SHA-1 358cc99a7d562a527a868871193607acd2740812 · Modrinth version IL1tuyRn · Project link unavailable Server only

AsyncParticles-3.4.0-beta.1+1.21.1.jar SHA-1 3591df55ff3396ec9fd24cd5a500e7438fa3b939 · Modrinth version EU69gnPW · Project link unavailable Client only

BadOptimizations-2.4.1-1.21.1.jar SHA-1 1461d8e46391efd32a3085150e86094c9f6f5c9d · Modrinth version S2qthD5S · Project link unavailable Client only

chunkactivitytracker-fabric-1.0.1-1.21.1.jar SHA-1 df78114c13c3ce53de4413de8f22dcc7aec543d5 · Modrinth version 6cklU8xZ · Project link unavailable Server only

cloth-config-15.0.140-fabric.jar SHA-1 5d82342a2df53fd6df712bfdd583a811572918a4 · Modrinth version HpMb5wGb · Project link unavailable Side not labelled

does_it_tick-fabric-1.1.4-1.21.1.jar SHA-1 d9e68cf246c7303196c0f6bf2eab24ca318ec1b7 · Modrinth version 1oufWQjb · Project link unavailable Server only

dynamic-fps-3.9.5+minecraft-1.21.0-fabric.jar SHA-1 b80091afaf1a7b1657a2ab18cf6caba00c240f45 · Modrinth version td4DfKSI · Project link unavailable Client only

enhancedblockentities-0.10.2+1.21.jar SHA-1 d81359d77fc7c5437f3e83e519dc2f869300f0cd · Modrinth version HBZAPs3u · Project link unavailable Client only

entityculling-fabric-1.9.5-mc1.21.1.jar SHA-1 dffd306c5aeba040595e2f02badf441db638624b · Modrinth version xcyXBGgI · Project link unavailable Client only

fabric-api-0.116.7+1.21.1.jar SHA-1 79e9f3e82499fbae5bd667b96a79927ae68f90eb · Modrinth version m6zu1K31 · Project link unavailable Side not labelled

fabric-language-kotlin-1.13.8+kotlin.2.3.0.jar SHA-1 05fe02fe61232c4ddea4059e8103281424d5a2bd · Modrinth version N6D3uiZF · Project link unavailable Side not labelled

ferritecore-7.0.2-hotfix-fabric.jar SHA-1 48ee764932d0c8ec81a2223dbe333886938e512c · Modrinth version bwKMSBhn · Project link unavailable Side not labelled

ForgeConfigAPIPort-v21.1.6-1.21.1-Fabric.jar SHA-1 18bf1f21cd2db6dcd4e42db85eae54e2a49a48ee · Modrinth version N5qzq0XV · Project link unavailable Side not labelled

fzzy_config-0.7.4-fix1+1.21.jar SHA-1 4e46df66d86fad9deccda388b1a77be011003c89 · Modrinth version QpNZ4LVv · Project link unavailable Side not labelled

ImmediatelyFast-Fabric-1.6.9+1.21.1.jar SHA-1 765b82b3b954025bd233077e734e1f0a7a4d536e · Modrinth version sy5ig8EF · Project link unavailable Client only

immersive_optimization-fabric-1.21-0.1.0.jar SHA-1 ff8c4793c983d500c056e13d64aa640e460d12ea · Modrinth version VcKXKkTt · Project link unavailable Server only

iris-fabric-1.8.8+mc1.21.1.jar SHA-1 4e0df4011503b4b36ba69877ea7247c1a47fea00 · Modrinth version zsoi0dso · Project link unavailable Client only

Ixeris-3.8.4+1.21.1-fabric.jar SHA-1 9318b00c620a8eb04e7a9e9b5a2995c21d61ea6b · Modrinth version L4oCRkXC · Project link unavailable Client only

krypton-0.2.8.jar SHA-1 73e792eb5f120787becda4b87b6ff18b26caea50 · Modrinth version Acz3ttTp · Project link unavailable Side not labelled

Ksyxis-1.3.4.jar SHA-1 143fe088170e5777d3ccf5b488d61ee3635ebffe · Modrinth version vCQj9Ui7 · Project link unavailable Server only

lithium-fabric-0.15.1+mc1.21.1.jar SHA-1 6038cf136da413753345bf9d48e5798241439894 · Modrinth version E5eJVp4O · Project link unavailable Side not labelled

modernfix-fabric-5.25.1+mc1.21.1.jar SHA-1 4ab39e9c736e7204146792c545ec5b29fc0a3872 · Modrinth version NnNX8LBn · Project link unavailable Side not labelled

modmenu-11.0.3.jar SHA-1 6213120772192040a0aeb5c7cfe330c068605b1f · Modrinth version YIfqIJ8q · Project link unavailable Client only

moreculling-fabric-1.21.1-1.0.6.jar SHA-1 e14150baf443abc24ee6236b837c287dd5950e95 · Modrinth version 1V6UtDhN · Project link unavailable Client only

noisium-fabric-2.3.0+mc1.21-1.21.1.jar SHA-1 642a672cfc60ff1e1262a39d7e160b1381c5120c · Modrinth version 4sGQgiu2 · Project link unavailable Server only

particle_core-0.2.6+1.21.jar SHA-1 5ed81f646fd22dc169b0081bfbfddf34280f6eca · Modrinth version d68J3hm8 · Project link unavailable Client only

reeses-sodium-options-fabric-1.8.3+mc1.21.4.jar SHA-1 c72f07a8f139f0420cbce29bd9eb29fb24db427f · Modrinth version KoUrx3jJ · Project link unavailable Client only

ScalableLux-0.1.0.1+fabric.d0d58ab-all.jar SHA-1 2ce889d9b1b210eef005ea03c3bbb39289c26e3f · Modrinth version Yx1tgJMI · Project link unavailable Side not labelled

sodium-extra-fabric-0.6.0+mc1.21.1.jar SHA-1 66160fac4fdb9ddd854c5ed068fc329d24d09fd1 · Modrinth version anDafurZ · Project link unavailable Client only

sodium-fabric-0.6.13+mc1.21.1.jar SHA-1 928a2598178c3a58b0638bab842f467d2e49251a · Modrinth version u1OEbNKx · Project link unavailable Client only

threadtweak-fabric-0.1.5+mc1.21.1.jar SHA-1 47fe715b4b41644817cac50a7c79ecf26f48d7e3 · Modrinth version F4sjmsi3 · Project link unavailable Side not labelled

threatengl-fabric-2.0.4-release.10.jar SHA-1 232803a232720cbac3205079be2b076093f76e59 · Modrinth version nK30v84J · Project link unavailable Client only

14 Dec 2025

Check the 1.21.11 · Fabric setup

Fabric1.21.11 release

Download on Modrinth

Looking for an older file? The official Modrinth project page is in Resources.