Opti Tech

Name: Opti Tech
Price: 8 EUR
Author: Ketari

A client-side modpack for technical redstone players

by Ketari

656 Downloads

0 Followers

fabricMC 1.21.1optimization

Rent Opti Tech Server

Screenshots

About this Modpack

OptiTech

1.20 versions require Java 21 to run, make sure to set it in your Java settings!!
If you don't know how or need a tutorial, watch this video: How to set Java 21 on Modrinth

Please read Custom Keybinds.txt before playing!! (located in the files)

As per description, OptiTech is a relatively simple client-side modpack for technical minecraft players, specificially focused on redstone. Featuring the best optimization mods and a collection of hand picked mods focused on making your work with redstone easier. As a bonus, offers full compat with optifine resource packs and shader packs and any QOL mod you'd ever need.

Main Features:

Optimization mods

Sodium (game rendering)
Lithium (game logic)
ModernFix (everything)
Noisium (terrain/world gen)
FerriteCore (memory)
Memory Leak Fix
Enhanced Block Entities
Faster Random
Immediately Fast (screen rendering)
Krypton (network)
C2me (chunk gen / load)
BadOptimizations (miscellaneous)
More Culling (block rendering)
LazyDFU (game load)
Exordium (gui and hud rendering)
Palladium (miscellaneous)
Client Side Noteblocks
Async Pack Scan (to help Respackopts)
Thread Tweak (tweaks MC thread)
Fey Tweaks (signs and beacons)
Particle Core
Async Locator
Clumps (experience orbs)

Redstone mods

World Edit (copy/paste, stacking, so much more)
Axiom (easy to use tools and more)
Reden (undo/redo of actions)
Carpet (full control over game elements)
G4mespeed (tick manipulations + animations)
SubTick (finer tick stepping control, 1.20.1 only)
BlockEventSeparator (separate block events in real time)
Litematica (schematics)
Tweakeroo (tweaks such as fly speed, flexible placement, freecam)
Scheduled Tick Visualizer (render ScheduledTick in real time)
Pistorder (shows block movement of pistons)
Register Reader (used for reading registers in computational builds)
Technical Utilities (WorldEdit and Litematica utilities)
Redstone Tools (redstone QOL mod, 1.20.4 only)
Redstone Multimeter (block changes visual tracking)
Redstone Helper (bunch of redstone tools)

Cool + QOL mods

Iris Shaders (shaderpack support)
Item Swapper (ability to quickly and easily swap items based on type)
Isometric Renders (make cool 3D renders of your builds)
Command Block IDE
NBT Autocomplete
Suggestion Tweaker
More Chat History
e4mc (open your world for other people to join easily)
Gamma Utils (fullbright + night vision)
Command Keys (make any custom macro)
Lamb Dynamic Lights or Sodium Dynamic Lights
Mouse Tweaks
Rebind All The Keys
Zoomify (fully customizeable zoom)
Advancement Info
Auth Me
Dust's Keymap or Keymap Maintained (one of my favorite mods, lets you easily see what keys are going to what. it can be toggled off and isn't on 1.20.4 sadly)
Backtro Mod (full control over fog + qol)
Respackopts (change resource pack settings)

Extra / Other mods

All Optifine format support mods (for resource packs, animations, etc)
GUI extras (AppleSkin & Detail Armor Bar)
Privacy mods (No Chat Reports & No Telemetry)
Log and debugging (LogBegone, MixinTrace, LogCleaner)

Resource packs

Extras:

Isometric Renders comes pre-installed with ffmpeg, meaning you can make cool animated renders
Custom organized keybinds and mod settings tuned for easy use
Comes with Complimentary Reimagined shaders installed

To install the modpack, download the Modrinth app and either find it in the "discover content" category and click install, or download it from the wesite and open it with the Modrinth app.

Currently actively maintained for Minecraft Java versions 1.20.1, 1.20.4, 1.21.1

Generative AI was not and is not used in the making of this modpack.

Available Versions

Opti Tech 1.5.0 | 1.21.1release

MC 1.21.1fabric89 downloads

July 11, 2025

Opti Tech 1.5.0 | 1.20.4release

MC 1.20.4fabric40 downloads

July 11, 2025

Opti Tech 1.5.0 | 1.20.1release

MC 1.20.1fabric49 downloads

July 11, 2025

Opti Tech 1.4.1 | 1.21.1release

MC 1.21.1fabric42 downloads

June 12, 2025

Opti Tech 1.4.0 | 1.20.4release

MC 1.20.4fabric46 downloads

June 11, 2025

How to Set Up a Opti Tech Server

Order Server

Choose at least 4 GB RAM (6 GB recommended for Opti Tech). Based on player count: per 8 players.

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "Opti Tech" and click "Install". The fabric loader and Minecraft 1.21.1 are configured automatically.

Start Server & Play

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

Frequently Asked Questions

Opti Tech 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 6 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 Opti Tech server really need?

Minimum 4 GB, recommended 6 GB for stable performance. per 8 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 €8/month).

Can I add custom mods to Opti Tech without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.1). 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.

Opti Tech server lagging – performance tips

1) Increase RAM to 6 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.