OptiClient

OptiClient

⚡High FPS, lots of supported optifine features, free custom capes, controller support, and much more!⚡ 1.21.8 beta!

by andrebalazs
1.6K Downloads
0 Followers
fabricMC 1.21.8lightweightoptimizationtechnology

Screenshots

Flight with elytra
Dynamic lighting
With shader pack
MInecraft - OptiClient logo
Logo

About this Modpack

This project has been archived because I don't have time to maintain it.

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Minecraft - OptiClient logo

Discord Github page Wiki How to download How to get a free cape

🔥OptiClient: The ultimate minecraft optimization!🔥

⚡The OptiClient is a modpack designed to replace OptiFine: higher FPS, lots of supported OptiFine features, and extras like minimap, world map, and free capes.

Why OptiClient and why is it better than OptiFine?

  • ⚡Huge FPS increase compared to Vanilla game and OptiFine.

  • ✔️Almost all OptiFine features are supported.

  • 🔝OptiClient includes over 90 optimization mods, whereas Fabulously Optimized contains only 40 to 50.

  • ➕There are also some extra features compared to OptiFine, such as minimap, world map, chat heads, controller support, and many more! All of them can be disabled or enabled depending on what you need.

  • 🚀Free, custom capes!

🔍If you are looking for mods to complement OptiClient, check out this collection.

⚙️You can change the settings of the mods or disable the mods by clicking on the mods button and searching for the mod you want with the search bar, then clicking on change settings.


❔Who is it for?

It's ideal for players with older or lower-end hardware, but also great for anyone who wants higher FPS or better graphics settings. Honestly, it's a great fit for everyone—because who doesn't love more FPS?


⚡FPS test

FPS with vanilla Minecraft:

40 fps

FPS with OptiFine:

72 FPS

FPS with OptiClient: ***

120 FPS

Vanilla OptiFine OptiClient
1-40 FPS 49-72 FPS 90-240 FPS

Hardware: CPU: Intel Core I5 8400 2.80Ghz, RAM: 4gb DDR4 (48gb system ram), GPU: NVIDIA GeForce GT 710

*The smallest number indicates the lowest and the largest number indicates the highest FPS

**FPS test is done on my very low-end computer. FPS may vary depending on hardware and graphics settings.

⚙️ List of mods

Mods:

Texture packs:

My other projects
  • No java edition subtitle

    Removes the "java edition" label from the main menu!
    Link

  • Pigstep serto mix

    Replaces Pigstep mono mix with Serto mix.
    Link


If you like the modpack, please support it by leaving feedback on the project's github page or on the Discord server. If you send a picture, it may be included in the gallery!


Anyone can join the development, just let us know on Github or on the Discord server! Whether it's testing the modpack or updating to a newer or an older version!


Currently, only version 1.1.0 is available on the github page.


FAQ

Q: Zoom is not working, what should I do?

A: You may need to enable zoom manually: go to mods, type "Zoomify" in the search box, click on it on the left, then click on "Configure" on the right. Then switch to the "Misc" tab, click on "Default Apply Preset", then click on "Done".

Q: Something is broken, or something needs to be added!

A: Tell me on github or discord.

Q: How do I enable controller support?

A: Go to mods, then type "controlify" in the search box. Click on it, then click on the "Configure" button. This is where you can pair your controller.

Q: The modpack will only make my FPS even lower.

A: You may have Distant Horizons enabled. This is a mod that allows for a larger field of view, but may cause problems on lower-end hardware.
To disable this mod: Go to Options, then click the button next to FOV in the top left corner. Disable the "Enable rendering" option, then click Done.

Q: How can I change the settings of other mods?

A: Go to the Mods button, then search for the mod you want.

Q: I have more questions or would like to chat.

A: Come on over to my discord server!


***(v 1.1.0, There may have been an FPS increase since then compared to the latest version.)

****The Minecraft logo is a trademark of Mojang AB.

Available Versions

OptiClient 1.7.0release
MC 1.21.1fabric202 downloads
May 30, 2025
OptiClient 1.7.0release
MC 1.21.4fabric105 downloads
May 21, 2025
OptiClient 1.6.0release
MC 1.21.4fabric57 downloads
May 15, 2025
OptiClient 1.5.0release
MC 1.21.4fabric31 downloads
April 23, 2025
OptiClient 1.4.0release
MC 1.21.4fabric30 downloads
April 21, 2025

How to Set Up a OptiClient Server

1

Order Server

Choose at least 6 GB RAM (8 GB recommended for OptiClient). Based on player count: per 5 players.

2

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "OptiClient" and click "Install". The fabric loader and Minecraft 1.21.8 are configured automatically.

3

Start Server & Play

Start the server – all mods are loaded automatically. Share the server IP with friends and play together!

Frequently Asked Questions

OptiClient server crashes or won't start – what to do?

Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 8 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.

How much RAM does a OptiClient server really need?

Minimum 6 GB, recommended 8 GB for stable performance. per 5 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €12/month).

Can I add custom mods to OptiClient without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.8). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.

OptiClient server lagging – performance tips

1) Increase RAM to 8 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.

Rent OptiClient Server

Start your own server with automatic modpack installation.

Recommended RAM:
8 GB(min. 6 GB)
From 12.00 / month
Create Server Now
1-Click Modpack Install
NVMe SSD Storage
DDoS Protection included
Automatic Backups

Details

License
MIT License
Server-side
Unsupported
Client-side
Required

Supported Versions

1.21.81.21.71.21.51.21.41.21.1

Start your OptiClient Server now

From €12.00/month with 8 GB RAM for the best performance.

Configure Server →