# Atomic ### _Minimal Mods. MAXIMUM Performance._ ## How to setup Atomic > - Download Atomic (the modpack) > - Import the .mrpack (or just download it straight from your launcher) > - Apply these JVM arguments: ``` -Xms2G -Xmx4G -XX:MaxMetaspaceSize=268M -XX:+UseG1GC -XX:MaxGCPauseMillis=100 -XX:InitiatingHeapOccupancyPercent=40 -XX:+ParallelRefProcEnabled -XX:+DisableExplicitGC ``` > - If you use a 64-bit modern OS like Windows 10/11, MacOS, or Linux use these instead: > - **(ATOMIC RECOMMENDS AZUL ZULU JAVA 17!)** ``` -XX:+UseZGC -XX:+DisableExplicitGC -Xms3G -Xmx4G -XX:MaxMetaspaceSize=276M ``` ### **Looking for Wayland builds? (LINUX ONLY)** - **Atomic for Wayland: https://modrinth.com/modpack/atomic-(wayland)** And you're done you can hit play! - If your launcher complains about you trying to manually set the RAM remove these arguments and set it via instance settings: ``` -Xms2G -Xmx4G -XX:MaxMetaspaceSize=268M ```

Mods (14 mods)

- Fabric API by modmuss50, Player7457 - Sodium by jellysquid3, IMS - Lithium by jellysquid3, 2No2Name - Starlight by spottedleaf - FerriteCore by malte0811 - Indium by comp500 - Krypton by astei - ServerCore by Wesley1808 - C2ME (Concurrent Chunk Management Engine) by ishland, duplexsystem - Enhanced Block Entities by FoundationGames - Alternate Current by Space Walker - Entity Culling by tr7zw, Pelotrio, vicisacat - Bedrodium by VidTu, kirillirik - LazyDFU by astei

Resource Packs (1 pack)

- 130% Saturation by Emil_the_sleeper

Benchmarks (4 benchmarks)

- Atomic gets over 1100+ FPS during world loading w/ F3 menu open 5/5 chunks render/simulation - Atomic gets over 1400+ FPS after world loading w/ F3 menu open 5/5 chunks render/simulation - Atomic gets over 390+ FPS during world loading w/ F3 menu open 24/24 chunks render/simulation - Atomic gets over 500+ FPS after world loading w/ F3 menu open 24/24 chunks render/simulation - ### Atomic 1.4 capped FPS to 255! (even with F3 menu + entities + rendering it is still glued to the FPS cap lol) Specs - CPU: 13th Gen Intel Core i5-13450HX - RAM: 16GB RAM (DDR5) - GPU: Intel UHD Graphics (iGPU) - Drive: NVMe Micron SSD (512GB) Settings - Render Distance: 5 Chunks - Simulation Distance: 5 Chunks - VSync: Off - FPS: Unlimited - Particles: Decreased - Leaves: Fast - Vignette: Off - FOV: 92 - Clouds: Fast - Biome Blend Radius: 5x5 - Mipmap Level: 4 - Fullscreen: Enabled

Comparisons (12 comparisons)

### Vanilla (1.17.1) - 0 mods (Vanilla) - 0 Resource packs - 369 FPS (World loaded, Default MC settings, untuned JVM, blocks, entities, clouds, F3 menu then split-second F3) - 5 ms ticks (MSPT) ### Atomic (1.17.1) - 14 mods - 1 Resource pack - 1460 FPS (World loaded, Default Atomic settings, tuned JVM, blocks, entities, clouds, F3 menu and then split-second F3) - 1 ms ticks (MSPT) ### Fabulously Optimized (1.17.1) - 49 mods - 2 Resource packs - 360 FPS (World loaded, Default FO settings, untuned JVM, blocks, clouds, entities, F3 menu and then split-second F3) - 3 ms ticks (MSPT) ### Sodium Plus (1.18.2) - 64 mods - 0 Resource packs - 140 FPS (Default Sodium Plus settings, untuned JVM, blocks, clouds, entities, F3 menu and then split-second F3) - 5 ms ticks (MSPT) ### OptiFabric (1.17.1) - 46 mods - 1 Resource packs - 677 FPS (Defaut OptiFabric settings, untuned JVM, blocks, clouds, entities, F3 menu and then split-second F3) - 3 ms ticks (MSPT) ### Remarkably Optimized (1.17.1) - 17 mods - 0 Resource packs - 649 FPS (Default RO settings, untuned JVM, blocks, clouds, entities, F3 menu and then split-second F3) - 4 ms ticks (MSPT) ### Additive (1.17.1) - 38 mods - 1 Resource pack - 1016 FPS (Default Additive settings, untuned JVM, blocks, clouds, entities, F3 menu and then split-second F3) - 4 ms ticks (MSPT) ### Performium (1.20.4) - 42 mods - 0 Resource packs - 1068 FPS (Default Performium settings, untuned JVM, blocks, entities, clouds, F3 menu and then split-second F3) - 2 ms ticks (MSPT) ### Optimization (1.17.1) - 16 mods - 0 Resource packs - 1004 FPS (Default "Optimization" settings, untuned JVM, blocks, entities, clouds, F3 menu and then split-second F3) - 4 ms ticks (MSPT) ### Essentially Optimized (1.21) - 18 mods - 0 Resource packs - 821 FPS (Default EO settings, untuned JVM, blocks, entities, clouds, F3 menu and then split-second F3) - 8 ms ticks (MSPT) ### FPS Modpack (1.19) - 15 mods - 0 Resource packs - 908 FPS (Default FM settings, untuned JVM, blocks, entities, clouds, F3 menu and then split-second F3) - 4 ms ticks (MSPT) ### MAX FPS: Optimized (1.17.1) - 10 mods - 0 Resource packs - 1137 FPS (Default MFO settings, untuned JVM, blocks, entities, clouds, F3 menu and then split-second F3) - 5 ms ticks (MSPT) ### How I test them World fully loaded, same visuals (blocks/entities/clouds), VSync off, FPS uncapped, F3 enabled + rapid toggle, defaults for each pack, JVM only tuned where provided. NOTE: _These are just comparisons all of these modpacks are great and the count is just for reference._

FAQ (5 questions)

### Why 1.17.1? - Newer Minecraft versions can introduce more worldgen complexity and rendering overhead, which can drastically reduce performance on low-end hardware. ### Why are you strict about mods? - Every additional mod increases CPU, memory, and loading overhead. I only include mods that improve performance or stability. ### Why Fabric? - Fabric is a lightweight, simple, and fast mod-loader and works really well for Atomic. ### Will you add QoL mo- - No. Atomic is built to be optimized and lightweight not include redundant QoL or bloat mods but it is still highly recommended to replace OptiFine with Atomic. ### Will you upload it to CurseForge? - No, the official modpack will be Modrinth only.

Default Launcher Instructions

- Download Fabric (https://fabricmc.net/) - Make sure you're in the client tab - Open the installer and set the game version to 1.17.1 and loader version to 0.18.4 - Click install - When it's finished download the modpack. - Convert the .mrpack with this tool: https://jamie.codeberg.page/mrpack-to-zip/@master/ - Extract the .zip and open your .minecraft folder (C:\Users\user\AppData\Roaming\minecraft) - Now open the .zip and select all the files and drag them into your .minecraft folder and you might get an message about files w/ the same name just hit "Replace the files in destination" THIS WILL OVERWRITE YOUR EXISTING CONFIG AND MODS! - Open the Minecraft Launcher and select the "Installations" tab and click the 3 dots and then "Edit" now click "More Options" and replace the JVM args with the ones listed at the top of the page and click "Done" once you're finished. - Now go back to the "Play" tab and you can launch the game.

Atomic's purpose

Atomic's purpose is to be a strict optimization pack designed to run on weaker systems. Atomic includes only mods that improve performance or stability and can only have 1 mod to optimize a certain part of the game

	Name	Version

Atomic

Tags

Creators

Details

1.2

Compatibility

Changes

Atomic 1.2

Content