// modpack server guide
All the Mods 11 (ATM11) server hosting & setup guide
An ATM11 server needs Java 25 and about 7–8 GB of RAM for up to 3 players.
The eleventh All the Mods pack and the first on Minecraft 26.1.2: a large tech, magic and exploration pack on NeoForge, still in early beta, with frequent updates as more mods come out for 26.1.
Pack details checked by hand against All the Mods 11 on CurseForge on October 12, 2026.
All the Mods 11 is a NeoForge modpack for Minecraft 26.1.2 with 267 mods. We'd pick our Premium plan (8 GB) for it.
- All the Mods 11 is still in beta (version 0.11.1-beta when we checked), and its CurseForge summary calls it a super early alpha, so expect frequent updates and take a backup before each one.
- Minecraft 26.1.2 needs Java 25 (Mojang's version manifest lists Java 25 for it), so the Java 21 image that runs All the Mods 10 won't start this pack.
- See also: All the Mods 10 server guide.
Quick facts
| Loader | NeoForge |
|---|---|
| Minecraft versions | 26.1.2 |
| Java needed | Java 25 for Minecraft 26.1.2 Java version chart. |
| Mods | 267 modsThe number of mods CurseForge lists for the pack, client-side ones included. |
| RAM | About 7–8 GB for 1–3 playersBy player count. |
| Downloads | 1,088,444 on CurseForgeAs of October 12, 2026. |
| Latest version | October 7, 2026 (version 0.11.1-beta)The newest version when we checked on October 12, 2026. |
| Official server files | Download pagePublished next to each version on CurseForge, for example ServerFiles-0.11.1-beta.zip for version 0.11.1-beta. |
| Where to get it | All the Mods 11 on CurseForge |
| Tags | tech, exploration, extra large, magic |
ATM11 on a server: what to know
All the Mods 11 runs on Minecraft 26.1.2 and was at 0.11.1-beta (7 October 2026) when we checked. Each version has its own server files on CurseForge, for example ServerFiles-0.11.1-beta.zip. The start script installs NeoForge 26.1.2.109 and prints that Minecraft 26.1.2 requires Java 25, but its version check only rejects Java older than 21, so a server on Java 21 gets past the script and still won't run the pack. Confirm the server really uses Java 25.
As with All the Mods 10, the script writes allow-flight=true, max-tick-time=180000, view-distance=8 and simulation-distance=5 only when server.properties doesn't exist yet, and user_jvm_args.txt starts at -Xms4G -Xmx8G. Spark is in the server files; for world generation stalls the team asks for a /spark profiler --timeout 30 --thread * report.
Watch out for
- An AE2 Storage Bus attached to Occultism storage caused severe tick lag in a profiled report that is still open, so avoid that setup for now. Source.
- NeoVitae's Daemonium Pestis fires llama spit that never despawns; one server reported more than 113,000 of them in a single chunk before watchdog crashes. Source.
Sources: curseforge.com, github.com, github.com (2), github.com (3), piston-meta.mojang.com. Checked October 12, 2026.
ATM11 server files
ATM11's authors publish official server files. Published next to each version on CurseForge, for example ServerFiles-0.11.1-beta.zip for version 0.11.1-beta. Get the official server files.
Use the server files for the exact version your players install: a server and client on different pack versions won't connect.
How much RAM does an ATM11 server need?
| Players online | RAM | DSN plan |
|---|---|---|
| 1–3 players | About 7–8 GB | Premium (8 GB) |
| 4–8 players | About 8–10 GB | Heavy (12 GB)Premium (8 GB) can do if players stay close. |
| 9–15 players | About 9.5–12.5 GB | Heavy (12 GB) if players stay closeMore than 12 GB if they spread out. |
Estimated from 267 mods with our RAM calculator, not measured: low end if players stay together, high end if they spread out.
With 9–15 players spread across the map, ATM11 can need more than 12 GB, our biggest plan. A lower view distance and a pre-generated world help it fit; past that, a host with bigger plans is the better choice.
Set Java's heap (-Xmx) 10–15% under the RAM you have, about -Xmx7000M on 8 GB. NeoForge 26.1.2 reads it from user_jvm_args.txt: uncomment the -Xmx line. RAM guide.
ATM11 server requirements
| Java | Java 25 |
|---|---|
| Loader | NeoForge for Minecraft 26.1.2 |
| CPU | Fast single-core speed (one main thread). With 267 mods, the first start takes minutes. |
| RAM | About 7–12.5 GB for 1–15 players (table above) |
| Disk | The server files, a growing world and backups |
| Network | TCP port 25565 open to players |
Recommended plan
Our pick for ATM11
Premium
8 GB RAM · planned launch price $30/month
CurseForge lists 267 mods for this early beta, client-side ones included, so 8 GB suits a small group; the authors keep adding mods, so move up to 12 GB as the pack grows or your group does.
Ordering is closed until we relaunch. We aren't taking orders or payments while we move to new hardware. Join the launch list and we'll email you when Premium servers open.
Running it for a bigger group or a public server? Go up to Heavy (12 GB, $42/month). Not sure? Email hello@dsnservers.com.
Planned launch price in USD, billed monthly once ordering opens, with a 7-day refund window.
How to make an ATM11 server on your own PC
What's specific to ATM11, step by step. The full walkthrough for any pack: how to make a modded Minecraft server.
- Install Java 25.
Check with
java -version. Java version chart. - Get the server files.
Download the official server files for the version your players use and unzip them into an empty folder. Follow the readme that comes with them.
- Start it and accept the EULA.
Run the start script in the server files, or the
run.sh/run.batthe NeoForge 26.1.2 installer writes, then seteula=trueineula.txtif you accept Mojang's EULA (EULA step). With 267 mods, the first start takes minutes. - Set the RAM with
-Xmx, sized from the table above. - Let friends connect: forward TCP 25565, or use a tunnel or host behind CGNAT (can't connect?).
Or run ATM11 on DSN
Once we relaunch (join the launch list), on DSN you'd install ATM11 from the panel's CurseForge modpack installer, pick Java 25 on the Startup tab and accept the EULA in the console. No port forwarding.
How to play ATM11 with friends
Each player installs ATM11 with the CurseForge app or Prism Launcher, the same version as the server, and adds the server's address under Multiplayer.
Different versions of ATM11 on the server and a client show up as Mismatched mod channel list or mod rejections. Why friends can't join, timeouts included.
Lag and performance on ATM11
Can't keep up! Is the server overloaded? means ticks take longer than 50 ms; more RAM won't fix that once ATM11 has enough (tick lag guide). For ATM11:
- Measure first: spark's
/spark tpsand profiler work on 26.1.2 and name the mod or machine using the tick time. - Distances:
view-distance=8and a lowersimulation-distanceinserver.properties. - Pre-generate: Chunky for 26.1.2,
/chunky radius 3000then/chunky start, before people explore.
Common ATM11 crashes
What a NeoForge 26.1.2 server running ATM11 hits most. For any other error, paste the log into the free crash log analyzer.
- Wrong Java version. ATM11 on Minecraft 26.1.2 needs Java 25. Started on Java 21, it stops with
UnsupportedClassVersionError: ... class file version 69.0, this version of the Java Runtime only recognizes class file versions up to 65.0. Java version fix. - Out of memory. ATM11 (267 mods) needs about 7–8 GB for 1–3 players;
java.lang.OutOfMemoryErrormeans it ran out. Out-of-memory fix. - Client-only mod on the server. This one shows up when the mods folder is copied from a player's game instead of installed as a server. Check a mods list with the client-or-server-side checker. Client-only mod fix.
- After adding or updating a mod. Mods you add to ATM11 by hand usually crash it with a missing dependency or a mixin conflict.
- Ticking entity or block entity. The crash report names it and gives its coordinates. Ticking entity fix.
Updates and support
Before moving ATM11 past version 0.11.1-beta, back up the world: see updating a modpack server without losing your world.
Bugs in ATM11 itself go to its authors: issue tracker. Server problems on DSN: hello@dsnservers.com or Discord.
Packs like ATM11
More: NeoForge server hosting, all modpack guides and how to make a modded server.
Run ATM11 on DSN when we relaunch.
Our pick, Premium: 8 GB, planned at $30/month.
DSN Servers isn't affiliated with All the Mods 11 or CurseForge. We wrote the summary and checked the pack's facts by hand on October 12, 2026. Sources: curseforge.com, curseforge.com (2), curseforge.com (3), curseforge.com (4), api.cfwidget.com, github.com, piston-meta.mojang.com.