Should I run ATM9 or ATM10?

Pick ATM9 if you want a world that lasts and a mod list that is not going to change under you, or if you specifically want the Gregstar endgame, which ATM10 does not have. Pick ATM10 if you want the newest Minecraft version and the current mod ecosystem. Both are kitchen-sink packs with the same quest structure, so the decision is really about stability against novelty.

How much RAM does an All the Mods 9 server need?

8 GB is a sensible starting point for around six players, matching ATM's general 8 to 12 GB guidance for their packs. Heavy automation raises it, and a GregTech line raises it noticeably. Before upgrading, take a spark profile: on packs this size the cause is usually one specific setup, such as a mob farm or an over-large Create contraption, rather than genuine memory pressure.

Why did my machines stop while I was offline?

FTB Chunks force-loads chunks only while a team member is online unless you change it. Open `config/ftbchunks-server.snbt`, find the `force_loading` group and set `force_load_mode: ALWAYS`, then restart. If you would rather keep the restriction and grant it to specific people, the permission is `ftbchunks.chunk_load_offline` through FTB Ranks. Per-player chunk limits on an existing world are changed with the `/ftbchunks admin` commands.

How do I pregenerate the world?

ATM9 has no Chunky, so use Forge's built-in `/forge generate ~ ~ ~ 20000`. Be careful with that last argument: on Forge it is the total number of chunks to generate, not a radius in chunks or blocks, which is the opposite of how the NeoForge command works. Pass the dimension argument to run it for the Nether or the End, and let it finish before your players log in.

Is it safe to update an existing ATM9 world?

Within a point release, usually, and the panel keeps your world and offers a backup during the update. The jump from 1.0.x to 1.1.x is the one to plan for, because Create moved to version 6 and Little Contraptions was removed from the pack, so anything built with it disappears. Back up, warn your group, and have everyone update their client on the same day.

Can I add mods to an ATM9 server?

Yes, and it is common, since 1.20.1 Forge has a large mod library. Upload jars into `mods/` through the file manager or SFTP and give the identical files to every player, because Forge will reject clients whose mod list does not match. Back up first, and check the mod actually targets Forge 1.20.1 rather than NeoForge, which is a different loader despite the shared history.

Minecraft modpack · CurseForge

All the Mods 9 Server Hosting

by ATMTeam

ForgeMinecraft 1.20.1Java 17

How install works

One-click install from the Modpacks tab once your server is ready

Recommended RAM: 8 GB
Latest build: v1.1.1Oct 2025
Mod loader: Forge1.20.1
Downloads: 13.6MCurseForge

All the Mods 9 is the pack that ATM servers settled on, and it has aged into the safe choice. It runs over 400 mods on Forge 1.20.1 with the same quest-driven structure as the rest of the series: the questline points you at the Allthemodium ore chain, that chain leads to the ATM Star, and the star is meant to be the moment you stop.

Except ATM9 does not stop there. Its distinctive feature is the Gregstar, an optional endgame that runs the whole thing again through GregTech's machinery and tolerances. You can ignore it entirely and play a normal kitchen-sink pack, or you can treat the ATM Star as the tutorial. No other ATM release offers that split.

The practical argument for ATM9 over the newer ATM10 is that it stopped moving. The last release landed in October 2025, so the mod list is settled, the guides and videos people find still match what is in front of them, and you are not updating a shared world every few weeks. That matters more on a server than on a single-player save. It suits groups who want one world to last a year.

Hosting All the Mods 9

8 GB, and what pushes past it

Eight gigabytes covers a group of six doing normal ATM things. The load profile is worth understanding before you scale: ATM9 is not heavy because of the mod count, it is heavy because of what players leave running. Automation from Mekanism and Create ticks whether or not anyone is watching, and if someone takes the Gregstar path, a GregTech line is a sustained tick cost, not a spike. Profile before you buy memory:

/spark profiler --timeout 180

Claims, and why your base goes idle

ATM9 ships FTB Chunks, and its default leaves people confused: claimed and force-loaded chunks only keep ticking while a team member is online. Farms, bees and ore processing quietly stop the moment the last player disconnects. The switch lives in the force_loading group of config/ftbchunks-server.snbt:

force_loading {
    force_load_mode: ALWAYS
    max_force_loaded_chunks: 25
}

On a world that already exists, per-player limits come from world data instead of the file, so raise them with /ftbchunks admin extra_force_load_chunks <player> set 100.

Pregenerating on Forge takes a count, not a radius

There is no Chunky in ATM9. Forge has its own command, and the argument is the one people get wrong:

/forge generate ~ ~ ~ 20000

That number is a total number of chunks to generate, not a radius, so it behaves nothing like the NeoForge equivalent. Add the dimension argument to cover the Nether and the End separately.

Java 17, and the 1.0.x to 1.1.x jump

1.20.1 runs on Java 17, which the installer picks for you. One update deserves real care: 1.1.0 moved Create to version 6 and removed Little Contraptions, and a removed mod takes its placed blocks out of your world with it. Back up before that jump, and if your group built contraptions on the old version, expect to rebuild them.

Stability

A pack that stopped moving

The final release landed in October 2025, so a shared world is not chasing updates every few weeks.

Pregen

/forge generate counts chunks

The Forge command takes a total chunk count, not a radius. Passing a radius generates far less than you expect.

Updating

1.1.0 removed mods

Create jumped to version 6 and Little Contraptions was dropped, so its placed blocks vanish from older saves.

How to install All the Mods 9 on your server

1
Order the server
The button on this page preselects the RAM this pack needs. It is online about a minute after checkout.
2
Open the Modpacks tab and search All the Mods 9
In the panel's Modpacks tab, search for All the Mods 9 and pick the ATM9 listing by ATMTeam, then choose build All the Mods 9-1.1.1.
3
Press install and wait
The panel downloads the server pack, installs the loader and the right Java version, then restarts.
4
Join with the same build
Everyone installs the same pack build in their launcher, then connects to the address on the Overview tab.

Available builds

Build	Minecraft	Loader	Released	Installable
v1.1.1	1.20.1	Forge	Oct 12, 2025	Installable
v1.1.0	1.20.1	Forge	Sep 11, 2025
v1.0.8	1.20.1	Forge	Apr 22, 2025	Installable
v1.0.7	1.20.1	Forge	Mar 19, 2025	Installable
v1.0.6	1.20.1	Forge	Mar 18, 2025	Installable