ATM10 Requirements: PC Specs and RAM Allocation for Singleplayer

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All The Mods 10 requirements for your own PC: the RAM the pack recommends, how to allocate it in CurseForge or Prism, and the CPU, GPU and storage to plan.

A player mining diamond ore with a pickaxe by torchlight in a Minecraft cave

Before you install All The Mods 10, you want to know two things: can your PC run it, and how much RAM should the game get? The ATM10 requirements below come from the pack's own files, read for version 8.4, which came out on 29 October 2026 for Minecraft 1.21.1 on NeoForge 21.1.265 with about 500 mods. They are for the PC you play on. For the All The Mods 10 requirements of a dedicated server, sized by player count, see our ATM10 server requirements guide.

Quick answer: ATM10 needs at least 6 GB of RAM allocated to Minecraft, because below 6000 MB the pack shows a warning at start-up. Its recommended RAM is 8 GB, rising to 12 GB on a PC with 32 GB or more, and the ATM team's help FAQ says to stay at or below 12 GB. In singleplayer your PC runs the world and the game inside that one allocation, so plan on 16 GB of system RAM, or 32 GB if you also run a server for friends on the same PC. Add 64-bit Java 21 (CurseForge and Prism install it for you), a CPU with strong single-core speed, a graphics driver with OpenGL 3.2 and an SSD. The ATM team publishes no CPU or GPU minimum.

ATM10 Requirements at a Glance

PartWhat your PC needs for ATM10Where it comes from
RAM for Minecraft6 GB minimum, 8 GB recommended, 12 GB on a 32 GB PCThe pack's Memory Settings config and manifest
System RAM16 GB for singleplayer, 32 GB to also run a server on itOur advice: the allocation plus room for Java and your operating system
JavaJava 21, 64-bitThe ATM team's Java guide; the pack warns about 32-bit Java
Game versionMinecraft 1.21.1 with NeoForge 21.1.265 (ATM10 8.4)The 8.4 manifest
CPUNo official minimum; single-core speed matters mostThe world runs at a fixed 20 ticks per second
GraphicsOpenGL 3.2 support; shaders are optionalMinecraft since 1.17; ATM10's Iris config selects no shader pack
StorageAn SSD; the mods alone take about 1.4 GBThe official 8.3 server files

How Much RAM Does ATM10 Need?

ATM10 has no system requirements page, but the pack states its memory needs in three places:

  • Memory Settings. ATM10 ships the Memory Settings mod with its own config. It sets a client minimum of 6000 MB and a maximum of 32000 MB, shows a warning outside that range, and works out a recommended amount from your PC's total memory.
  • The manifest. The manifest.json in the 8.4 client pack, the file launchers install the pack from, sets recommendedRam to 8196 MB.
  • The ATM team's FAQ. For crashes at launch, the team's help FAQ says to check that 8 GB (8,192 MB) is allocated and no more than 12 GB (12,288 MB). The ATM10 FAQ names a lack of RAM as the most likely reason the game crashes while launching.

This is what Memory Settings recommends for your PC:

Your PC's total RAMRecommended allocation for ATM10
16 GB or lessabout 8,000 MB
24 GBabout 10,000 MB (the mod scales between 16 and 32 GB)
32 GB or more12,000 MB

If you start the pack with less than about 6 GB, you get a screen that says "Less memory allocated (...) than recommended for this pack, minimum is: 6000 MB", followed by the amount it recommends for your system.

Singleplayer needs this much because your PC plays two roles. NeoForge's documentation explains that in singleplayer, your game "spins up a logical server" and connects to it on the same machine. That logical server runs the game logic, such as entity ticking, mob spawning and every machine in your base, while the client draws the world on its render thread. Both run in one Java program and share the heap you set in the launcher, the -Xmx value that Oracle's documentation defines as the maximum heap size. Java also uses memory outside the heap, for example for the class metadata of about 500 mods, and by default that part has no size limit, so your PC needs a margin over whatever you allocate.

Can You Run ATM10 With 8, 12, 16 or 32 GB of RAM?

  • 8 GB: The pack's 6000 MB minimum would leave about 2 GB for your operating system, the launcher and Java's own memory. CurseForge warns once you allocate more than 75% of your memory, about 6 GB on an 8 GB PC, so ATM10's minimum sits right on that line. We would not play ATM10 on 8 GB; a lighter modpack fits better.
  • 12 GB: Workable. Allocate the recommended 8 GB and close the browser and other heavy apps while you play.
  • 16 GB: The comfortable minimum for singleplayer and the first row of the pack's own table: allocate 8 GB.
  • 24 GB: Allocate about 10 GB.
  • 32 GB or more: Allocate 12 GB, the top of the pack's recommendations. More does not help: the ATM team's FAQ says no more than 12 GB, and Prism Launcher's documentation warns that more RAM allocated does not mean better performance.

How to Allocate RAM for ATM10

Your launcher decides how much memory Minecraft gets. In the CurseForge app the default for modpacks is 4096 MB, below ATM10's minimum, so check the number before your first start.

CurseForge app:

  1. Open Settings, choose Minecraft under Game Specific and scroll down to Java Settings.
  2. Switch on "Use modpack author's recommended RAM settings when available", so the app follows a pack author's recommendation. The Allocated Memory slider below it sets the default for every profile without one.
  3. To set ATM10 on its own, go to My Modpacks, open ATM10, click the three dots next to Play and choose Profile Options.
  4. Under Memory Settings, select Custom RAM Allocation, set 8192 MB (or the value from the table above) and click Done.

If you drag a slider past 75% of your memory, CurseForge shows a High Memory Allocation warning.

Prism Launcher:

  1. Right-click the ATM10 instance and choose Edit...
  2. Open Settings and then the Java tab.
  3. Tick Memory and set Maximum Memory Usage, the -Xmx value, to 8192 MiB or the value for your PC.
  4. Close the window and launch the instance.

When you import ATM10 from CurseForge into a new Prism instance, Prism 11 already does this for you: it reads the pack's 8196 MB recommendation and sets it as the instance's maximum memory, or 90% of your RAM if that is lower.

The ATM team's Java guide also lists client Java arguments. You do not need them to start the pack; our ATM10 JVM arguments guide explains what they change.

CPU, Graphics Card and Storage for ATM10

CPU. Minecraft runs the world at a fixed 20 ticks per second. When a computer cannot keep up, ticks per second drop, and everything timed in ticks, from furnaces to crops, slows down. In singleplayer your CPU runs those ticks for the logical server while it also prepares every frame you see. The ATM team lists no CPU minimum. In practice single-core speed matters more than core count, and a recent desktop CPU with six or more cores leaves room for the game, Java's garbage collector and chunk generation at the same time.

Graphics card. Minecraft has rendered with the OpenGL 3.2 core profile since Java Edition 1.17, so your graphics driver has to support OpenGL 3.2. ATM10 ships the rendering mod Sodium and the shader loader Iris, but its Iris config selects no shader pack, so out of the box you play without shaders. A shader pack is where a strong graphics card pays off. On a laptop, the ATM team's crash FAQ tells you to update your GPU drivers and make sure the game runs on the dedicated graphics card.

Storage. The mods in the official 8.3 server files take 1.4 GB unpacked, and the 8.4 client pack adds 238 MB of configs, scripts and textures in 3,853 files. Minecraft's own files, NeoForge's libraries and Java come on top, and your world grows with every chunk and dimension you explore. Install the instance on an SSD, because the pack reads about 500 mod files and thousands of configs and scripts at every start.

Is Your PC the Bottleneck? Check FPS and TPS

Two numbers tell you which part of your PC is struggling. FPS is the client drawing frames. TPS is the logical server running your world, and 20 is full speed. ATM10 includes the spark profiler: /spark tps prints the ticks per second and CPU usage, and the ATM team's lag guide says normal players can run it. For frame drops, use /sparkc, the client version of the same command. A full profile with /spark profiler needs commands enabled in a singleplayer world.

  • TPS below 20: your CPU cannot keep up with the world. Lower Simulation Distance first. It sets in how many chunks entities are updated and blocks and fluids are ticked, and the Minecraft Wiki notes that it costs more performance than the same level of render distance.
  • Low FPS while TPS stays at 20: lower Render Distance. Fewer visible chunks means each frame renders faster.

For a server rather than a singleplayer world, our ATM10 lag fix guide goes further.

Hosting ATM10 for Friends From Your Own PC

Letting friends into your world turns your PC into their server as well. There are two ways to do it.

  • Open to LAN in the pause menu lets players on the same local network join your singleplayer world. Their loaded areas then live in your game's allocation too, so give ATM10 the top value for your PC from the table above.
  • The official server files run a separate server next to your game. They start it with -Xms4G -Xmx8G in user_jvm_args.txt, an 8 GB heap of its own. Add your 8 GB client and you have 16 GB of heap before Java's own memory and your operating system, which is why we put a PC that hosts and plays ATM10 at 32 GB.

Friends outside your home network need port forwarding on your router, or a VPN, to reach a server on your PC, and the world is only online while your PC is on. Server and players also need the exact same pack version. The ATM team's server guide has you pick that version under Files on CurseForge and download its server files under Additional Files.

A dedicated server also helps a PC that copes with the client but not with the world. When you join a server, the logical server runs on that machine, so the world, its machines and its chunk generation stop competing with your frames. The client still loads every mod, which is why ATM10 keeps its 6000 MB minimum on your side. Our All The Mods 10 server hosting starts at 12 GB for 1 to 5 players, with a modpack installer in the panel. For player counts and plan sizes, see the server requirements guide.

FAQ

How much RAM should I allocate to ATM10? About 8 GB on a PC with up to 16 GB, about 10 GB on 24 GB and 12 GB on 32 GB or more, the amounts the pack's Memory Settings config recommends. Never go below 6 GB.

Can I run ATM10 with 8 GB of RAM? Only barely. The 6000 MB minimum leaves about 2 GB for everything else and already sits at CurseForge's 75% warning line. Joining a server does not lower that minimum, because the client still loads every mod.

Is 16 GB of RAM enough for ATM10? Yes for singleplayer. Allocate 8 GB, the amount the pack recommends for a 16 GB PC. It is not enough to run the official server files for friends next to your game, because that server starts with its own 8 GB heap.

Why does ATM10 crash while launching? The ATM10 FAQ names a lack of RAM as the most likely cause, so check your allocation first. Next, make sure the launcher uses 64-bit Java 21; the pack warns when it finds 32-bit Java on a 64-bit system. Our ATM10 Java guide shows how to pick the right version.

What are the ATM10 server requirements? That is a different calculation, because a server draws no frames and its RAM grows with players and loaded chunks. The official server files set an 8 GB heap, and our ATM10 server requirements guide sizes servers at 12 GB for 1 to 5 players, 16 GB for 5 to 15 and 32 GB beyond that.

Which Java version does ATM10 need? Java 21, like every pack on Minecraft 1.21. The CurseForge app installs Java for the game automatically, and Prism Launcher downloads the Java build Mojang recommends when Auto-download Mojang Java is switched on.

Sources

All opened on 31 October 2026: