All The Mons Server Requirements (ATMons): RAM, CPU & Performance Guide

All The Mons (ATMons) is a new modpack from the ATMTeam that blends All The Mods 10's extensive tech and magic mods with Cobblemon's Pokémon-style RPG mechanics. Running on Minecraft 1.21.1 with NeoForge, ATMons combines quest-driven progression, automation systems, and creature collection into one massive experience.

This combination makes ATMons one of the most resource-intensive modpacks available. With 300+ mods, active Cobblemon spawns, complex automation, and quest systems running simultaneously, your server needs serious RAM and CPU headroom to run smoothly. This guide covers exactly what you need.

For general modded server RAM guidance, see our Modded Minecraft Server RAM Guide. For understanding why servers lag even with enough RAM, see our guide on why Minecraft servers lag.

What All The Mons Includes

ATMons combines three major systems that each demand significant resources:

Tech Mods (Automation & Processing)

ATMons includes the full All The Mods 10 tech suite: Create Mod for mechanical automation, Mekanism for chemical processing, Applied Energistics 2 for digital storage, and dozens of other tech mods. These mods create complex processing chains that require:

• Constant block updates and tick processing
• Item entity management (thousands of items in pipes/conveyors)
• Network calculations (AE2 channels, Create contraptions)
• Machine state tracking in RAM

Magic Mods (World Generation & Entities)

Magic mods like Ars Nouveau, Mahou Tsukai, and Apotheosis add spell systems, magical creatures, and enhanced mobs. These mods increase:

• Entity complexity (mobs with custom AI and abilities)
• World generation overhead (magical structures, biomes)
• Particle effects and visual processing
• RAM usage for spell data and enchantment systems

Cobblemon Features (The Resource Killer)

Cobblemon adds Pokémon-style creatures that spawn naturally, battle, evolve, and interact with the world. This is where ATMons gets heavy:

• Active spawns: Cobblemon spawns creatures constantly, adding 50-200+ entities per loaded chunk
• AI processing: Each Cobblemon has complex AI for movement, battles, and interactions
• Data storage: Player teams, creature stats, and battle data stored in RAM
• Quest integration: Cobblemon quests add additional processing overhead

The combination of tech automation, magic mods, and active Cobblemon spawns creates a perfect storm of resource usage. Your server processes thousands of entities, complex automation, and active creature AI simultaneously.

Recommended RAM for Different Player Sizes

ATMons needs more RAM than most modpacks because of mod count (300+), entity complexity (Cobblemon + enhanced mobs), and automation systems (Create contraptions, AE2 networks). Here's what you need by player count:

CPU Considerations

RAM prevents crashes, but CPU determines TPS (Ticks Per Second). ATMons needs strong single-core CPU performance because Minecraft's tick loop runs on one thread. Your server processes thousands of entities, automation logic, and world generation on that single thread.

Why Single-Core Performance Matters

ATMons creates massive CPU load from:

• Entity processing: Cobblemon spawns create 50-200+ entities per chunk, each requiring AI calculations every tick
• Automation logic: Create contraptions, Mekanism machines, and AE2 networks process items constantly
• World generation: Modded chunk generation is slower than vanilla, requiring more CPU time
• Quest systems: Quest tracking and progression checks add tick overhead

All of this runs on a single thread. A CPU with 8 slow cores will perform worse than a CPU with 4 fast cores for ATMons. Single-core clock speed and IPC (instructions per cycle) matter more than total cores.

Why Shared CPU Hosting Lags

Many budget hosts use shared CPU—your server competes with others on the same physical CPU. When ATMons needs CPU for entity processing or chunk generation, but another server is using 90% of the CPU, your TPS drops.

ATMons needs consistent CPU access. Shared hosting creates unpredictable performance:

• TPS drops during peak hours when other servers are active
• Chunk generation slows when CPU is contested
• Entity processing lags during automation spikes
• Cobblemon battles stutter when CPU is shared

Look for hosting with dedicated CPU allocations (e.g., 400-500% CPU guaranteed). This ensures your server gets consistent CPU access even when other servers are busy. For more on CPU vs RAM, see our CPU vs RAM guide.

World Generation & Entity Load

ATMons world generation is significantly heavier than vanilla or lighter modpacks. Modded biomes, structures, ores, and Cobblemon spawns all add generation overhead.

Cobblemon Spawns

Cobblemon spawns creatures naturally across the world. Unlike vanilla mobs that spawn in groups, Cobblemon spawns individual creatures constantly. This means:

• 50-200+ Cobblemon entities per loaded chunk (depending on biome and spawn rates)
• Each creature has AI for movement, battles, and interactions
• Spawn calculations happen during chunk generation and continuously during gameplay
• Entity data stored in RAM (stats, moves, evolution progress)

With multiple players exploring, you can have 1000+ active Cobblemon entities across loaded chunks. Each requires CPU processing every tick.

Quests & Structures

ATMons includes quest systems (FTB Quests or similar) that track player progress, reward distribution, and objective completion. These systems:

• Check player inventories and progress every tick
• Store quest data in RAM for all players
• Generate quest-specific structures during world generation
• Add CPU overhead during reward processing

Faster Storage Requirements

Modded world generation, Cobblemon spawns, and structure placement require fast storage. Slow storage (traditional HDDs or oversold shared storage) causes:

• Chunk generation delays (players wait for terrain to load)
• World save lag (server freezes during saves)
• Backup slowdowns (affects server performance during backups)
• Entity data loading delays (Cobblemon spawn data loaded from disk)

NVMe SSDs are 3-5x faster than SATA SSDs for random reads/writes, which Minecraft does constantly. For ATMons, NVMe storage makes a noticeable difference in chunk loading and world generation speed.

Client vs Server Requirements

ATMons has different requirements for clients (players) and servers. Understanding both helps you allocate resources correctly.

Client RAM Settings

Players need to allocate enough RAM to run ATMons client-side. The modpack loads 300+ mods, textures, models, and Cobblemon assets into client memory.

Recommended client RAM: 6-8 GB allocated to Minecraft

Allocating too much RAM (10+ GB) can hurt performance because Java's garbage collector takes longer to clean larger memory pools, causing FPS stuttering. For client FPS optimization, see our FPS optimization guide.

How to Allocate Memory in CurseForge / Launchers

Most launchers let you set RAM allocation in settings:

Important: Don't allocate more than 8 GB to the client. Java's garbage collector becomes inefficient with larger heaps, causing FPS drops. 6-8 GB is the sweet spot for ATMons.

Server RAM

Server RAM requirements are different from client. Servers need more RAM because they:

• Process game logic for all players simultaneously
• Store loaded chunks and entity data for the entire world
• Handle automation and processing for all players
• Manage Cobblemon spawns and entity data across all loaded areas

Server RAM scales with player count and activity. Use the recommendations in the "Recommended RAM" section above based on your expected player count.

Installation Tips for Servers and Clients

ATMons requires specific setup steps. Missing these can cause crashes or performance issues.

Modpack Version

Always use the latest stable version of ATMons. The modpack is actively updated, and newer versions often include performance fixes and optimizations. Check the modpack page on CurseForge or Modrinth for the latest release.

NeoForge

ATMons runs on NeoForge (not Forge or Fabric). NeoForge is a fork of Forge with performance improvements and modern features. Make sure your server and clients use the correct NeoForge version specified by the modpack.

Most hosting providers support NeoForge automatically when you install the modpack. If you're self-hosting, download the NeoForge installer from the official NeoForge website and install the server version matching the modpack's requirements.

Modpack Server Files

When setting up an ATMons server, you need:

• Server files from the modpack: Download the server pack from CurseForge/Modrinth (not the client version)
• Correct Java version: ATMons requires Java 21 or newer for optimal performance
• JVM arguments: Use optimized arguments for modded servers (e.g., -Xms4G -Xmx12G for a 12 GB server)
• World pre-generation: Consider pre-generating chunks to reduce CPU load during exploration

Most hosting providers handle server file installation automatically. If you're self-hosting, extract the server pack, configure server.properties and JVM arguments, then start the server.

Summary

All The Mons (ATMons) is a resource-intensive modpack that combines All The Mods 10's tech and magic mods with Cobblemon's creature collection mechanics. It requires:

• RAM: 8-10 GB for solo, 10-12 GB for small groups, 12-16 GB for medium communities, 16-20 GB+ for large servers
• CPU: 400-500% CPU minimum, with strong single-core performance for TPS stability
• Storage: NVMe SSDs recommended for faster chunk generation and world saves
• Client RAM: 6-8 GB allocated (don't exceed 8 GB)

The combination of 300+ mods, active Cobblemon spawns, and complex automation creates significant resource demands. Choose hosting with transparent CPU/RAM allocations and flexible scaling so you can adjust resources as your community grows.

For more on modded server requirements, see our Modded Minecraft Server RAM Guide and our guide on why Minecraft servers lag.