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OptimisticMC project artwork

Modrinth · Minecraft modpack

OptimisticMC

This mod collection will allow you to play Minecraft with higher FPS, if you have a very weak computer you should download it. Even if you have a powerful enough PC you should also try my collection.

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

Quick answer

Which OptimisticMC release matches 1.20.5?

Updated 6 days ago
Best match for your filters OptimisticMC 1.20.5v2
Game version 1.20.5
Loader Fabric 0.17.2

OptimisticMC 1.20.5v2 is a complete pack release for 1.20.5 with Fabric 0.17.2. Install it as its own launcher instance. If the creator publishes a separate server file, make sure it names this exact pack release. 22 mods in this pack file.

Pack setup

How should I set up OptimisticMC for players and a server?

Use OptimisticMC 1.20.5v2 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 OptimisticMC 1.20.5v2
Dedicated server setup Match OptimisticMC 1.20.5v2
Pack loader Fabric 0.17.2

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 22
Client only 10
Server only 1
Not labelled 11

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 OptimisticMC?

OptimisticMC 1.20.5v2 on 1.20.5. The pack contents and setup notes below stay tied to that release.

22 mods in this pack file

The selected pack release is OptimisticMC 1.20.5v2. That file is for Minecraft 1.20.5 with Fabric 0.17.2. It contains 22 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 OptimisticMC?

🚀 OptimisticMC: Peak Performance for Everyone

OptimisticMC is a meticulously curated mod collection designed to squeeze every bit of performance out of your hardware. Whether you are playing on an aging laptop or a high-end gaming rig, this pack ensures your Minecraft experience is buttery smooth and stutter-free.

✨ Why choose OptimisticMC?

Extreme FPS Boost: Advanced optimization of the graphics engine and data processing.
Lightweight & Clean: Only essential performance mods—no bloatware, no unnecessary features.
Multiplayer Ready: Perfectly optimized for both solo survival and large-scale server play.

🛠 Installation & Setup:

Download: We recommend using the Modrinth App for the best experience.
Allocate RAM (Mandatory): Go to the "Java and memory" tab, check "Custom memory allocation," and set your maximum RAM. This is required before your first launch to ensure stability.
Stay Updated: If you are using the Modrinth App, click the "Update all" button to get the latest performance patches.

🐛 Feedback & Support

Found a bug or experiencing a crash? Let us know!
Contact: OptimisticMC report.

Project description from Modrinth.

Mods in OptimisticMC 1.20.5v2

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

alternate-current-mc1.20-1.9.0.jar SHA-1 f09b6c60556ca329b82d4bdb965dd4f574c0e1e3 · Modrinth version ckuIQWvo · Project link unavailable Server only
BadOptimizations-2.3.0-1.20.5-20.6.jar SHA-1 279fddf148cde9c0789ebeb6bb7035532f749c92 · Modrinth version eMYWZlv2 · Project link unavailable Client only
c2me-fabric-mc1.20.5-0.2.0+alpha.11.89.jar SHA-1 f862d00598ea3f10b70fc800e43f660871618d30 · Modrinth version d3wUETCr · Project link unavailable Side not labelled
Chunky-1.4.10.jar SHA-1 4ebe521f903ec63011d5a633098502987d37b58e · Modrinth version ZrmnYk7q · Project link unavailable Side not labelled
cloth-config-14.0.139-fabric.jar SHA-1 6ed3c03b2269fee345f6c67eca876b78552272c3 · Modrinth version g0uTATyM · Project link unavailable Side not labelled
collective-1.20.5-7.54.jar SHA-1 da1f96ab276227b83f3e22195624cb0c7fd2ceee · Modrinth version I3HtlXHN · Project link unavailable Side not labelled
Debugify-1.20.5+1.0.jar SHA-1 0e7d6bc539b2332c416299799b47e55c7740d088 · Modrinth version abm18PGR · Project link unavailable Side not labelled
dynamic-fps-3.9.5+minecraft-1.20.5-fabric.jar SHA-1 f29fbe0ce38c4cbb649835590f7fd22bf936da36 · Modrinth version jXgy1wIo · Project link unavailable Client only
enhancedblockentities-0.10.1+1.20.6.jar SHA-1 23a3ec2dea0cc6a69b0ae8fbd5a176662bd6eae4 · Modrinth version BKpMtYZB · Project link unavailable Client only
entityculling-fabric-1.6.4-mc1.20.5.jar SHA-1 4d6a9af06319da9a3cad1ef619e3011af3f5a42c · Modrinth version dmSSEQmZ · Project link unavailable Client only
fabric-api-0.97.8+1.20.5.jar SHA-1 cbfa74cd136f0391e8713651a80fdc9f7358c0e0 · Modrinth version GCdY4I8I · Project link unavailable Side not labelled
ferritecore-6.1.1-fabric.jar SHA-1 fe734f75aea4cb9a9680978e975e06f2e90cbcb7 · Modrinth version i9RcCdZv · Project link unavailable Side not labelled
ImmediatelyFast-Fabric-1.3.0+1.20.6.jar SHA-1 6cc1e638455fdbc3bfd5179f75be657183c1eeae · Modrinth version ISvVqTAo · Project link unavailable Client only
krypton-0.2.7.jar SHA-1 ad7554550eafa64f157cea3d03c00da73340e6f5 · Modrinth version PYi5mm1G · Project link unavailable Side not labelled
language-reload-1.7.4+1.20.6.jar SHA-1 9c58acdac6e94b148b6a7c9f73c6189ce89cc80c · Modrinth version gHagbfXK · Project link unavailable Client only
lazydfu-0.1.3.jar SHA-1 0dfa8b03ed408fb7fdada29e01cfebba02af1049 · Modrinth version 4SHylIO9 · Project link unavailable Side not labelled
lithium-fabric-mc1.20.5-0.12.5.jar SHA-1 c4d41817f3c4dcfb48b15bf9674b6eaed753d234 · Modrinth version p25IJhj0 · Project link unavailable Side not labelled
modernfix-fabric-5.17.0+mc1.20.5.jar SHA-1 4302d03bd29e32efff207013635b7f1ae5266cfd · Modrinth version tmmvhxCF · Project link unavailable Side not labelled
modmenu-10.0.0.jar SHA-1 ff8c299d701db928256c0c5f06c0b90c8fe97ac4 · Modrinth version HLa8flfl · Project link unavailable Client only
moreculling-1.20.5-0.25.0.jar SHA-1 33740e68b2245f686e1e1f2e32f19b614526a559 · Modrinth version yduz8IZo · Project link unavailable Client only
reeses_sodium_options-1.7.3+mc1.20.6.jar SHA-1 8e2a2dfc616f4f1adbdba493e17c67007b121c21 · Modrinth version eVQOh2ku · Project link unavailable Client only
sodium-fabric-0.5.8+mc1.20.6.jar SHA-1 2f73c4a26c553bf0f0d2f921dd5a09ed90c515d8 · Modrinth version IZskON6d · Project link unavailable Client only

Pick your setup

OptimisticMC by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

35 available setups

Showing the newest 12 of 35 game versions. Older files are in the list below.

Made local changes? Try them in a copied instance before touching a world you care about.

Recent files

OptimisticMC versions and loaders

2 of 73 releases match
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Looking for an older file? The official Modrinth project page is in Resources.