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Thorium Optimization project artwork

CurseForge · Minecraft mod

Thorium Optimization

Nuclear-grade client optimization and frame-pacing engine designed to eliminate micro-stutters, stabilize 1% lows, and maximize FPS with real-time telemetry.

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

Quick answer

Which Thorium Optimization release should I use?

Updated 21 days ago
Latest stable file thorium-0.1.2+26.3.jar
Game version 26.3
Loader Fabric

Thorium Optimization thorium-0.1.2+26.3.jar targets 26.3 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.

Where it goes

Is Thorium Optimization required on the client, server, or both?

The project page does not say whether this file belongs on the client, dedicated server, or both.

Client Source doesn’t say
Dedicated server Source doesn’t say
Loader for this release Fabric
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

Understand client and server requirements Read the Minecraft installation guide

What else does Thorium Optimization thorium-0.1.2+26.3.jar need?

thorium-0.1.2+26.3.jar. Change the file and its required mods may change too.

No extra mods listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional mods.

Before you install it

Add Thorium Optimization without breaking your instance.

Built for Thorium Optimization thorium-0.1.2+26.3.jar. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use thorium-0.1.2+26.3.jar. It targets 26.3 with Fabric; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    This file does not list any required mods. Do not add a library just because a different file uses it.

  3. 03

    Put it on the correct side

    The project page does not say whether this file belongs on the client, dedicated server, or both.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside thorium-0.1.2+26.3.jar. It opens that exact file at the source.

About this project

What does Thorium Optimization add?

Thorium - Client-Side Optimization Engine

Thorium is a client-side performance and frame-pacing optimization engine for Minecraft. It is engineered to eliminate micro-stutters, smooth out frametime spikes, and boost FPS without changing vanilla graphics or gameplay.

While most mods only focus on maximum peak FPS, Thorium focuses on 1% and 0.1% frame lows, ensuring smooth and consistent gameplay even when flying fast with Elytras or exploring crowded bases.

Key Features

  1. Built-in Stutter Monitor HUD (Press F6)
    A clean, real-time performance overlay showing live frametimes, average and max ms spikes, frame stability score, and active RAM usage.

  2. Budgeted Chunk Upload Pacer
    Spreads chunk mesh uploads across frames to eliminate freezing and hitching when loading new terrain or flying with an Elytra.

  3. Occlusion & Frustum Culling
    Automatically skips rendering hidden chunks and concealed block entities (like chests and hoppers) before they reach the GPU, significantly increasing FPS in large bases.

  4. Proactive Memory Management
    Performs smart memory cleanups during idle moments to prevent sudden Java Garbage Collection (GC) lag spikes during gameplay.

  5. Dynamic Entity LOD
    Optimizes animations and tick updates for distant mobs, keeping gameplay smooth even near massive mob farms.

  6. Modern Video Settings Screen (Press F8)
    A clean, translucent settings menu with 100% working options and 3 built-in hardware presets.

Performance Profiles

Potato Mode: Designed for low-end laptops and integrated GPUs. Maximizes FPS by aggressively reducing rendering overhead.
Balanced Mode (Recommended): The ideal balance for everyday gaming. Delivers stable 60+ FPS frametimes with full vanilla graphics.
Nuclear Max Mode: Built for high-refresh rate monitors (144Hz+) and dedicated GPUs. Uncaps frame pacing for ultra-low latency response.

Hotkeys

F6: Toggle Stutter Monitor HUD (On / Off)
F7: Toggle Extreme FPS Boost Mode
F8: Open Thorium Video Settings

Compatibility

Modloader: Fabric Loader
Supported Minecraft Versions: 1.21.1, 26.1, 26.2, 26.3
Safe for Multiplayer: Yes, 100% client-side. Safe to use on Hypixel, Realms, and public SMP servers.

How to Install

  1. Download the Thorium .jar file matching your Minecraft version.
  2. Place the file inside your .minecraft/mods folder.
  3. Launch Minecraft using your Fabric profile.

Project description from CurseForge.

Pick your setup

Thorium Optimization by Minecraft version and loader

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

7 available setups

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

Thorium Optimization versions and loaders

10 of 10 releases match

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

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