ATM10 Server RAM: How Much You Need (Small Group)
Published
Short answer: 10 GB for a small group (2 to 5 players), 12 GB for 6 to 10, and 14 to 16 GB beyond that. Below 8 GB, All the Mods 10 will struggle to start or will stutter as soon as you build automation. If that's more than you want to pay, ATM10: To the Sky runs on 5 GB.
All the Mods 10 (ATM10) is a kitchen-sink NeoForge pack on Minecraft 1.21.1. The pack's CurseForge page doesn't give server RAM, so every number you'll see online comes from hosts and testers. Here's how that lines up with ours.
RAM by group size
| Players online at once | ATM10 | ATM10: To the Sky |
|---|---|---|
| 2 to 5 | 10 GB | 5 to 8 GB |
| 6 to 10 | 12 GB | 8 to 10 GB |
| 10 to 20 | 14 to 16 GB | 12 GB |
These are from our modpack RAM guide, which is the consensus of pack listings and public host guides (checked October 2026) plus our own rule of thumb of about 1 GB per 3 extra players. The first row is public consensus; the other two are estimates, and the guide labels them as such.
Our order page sets the minimum size for ATM10 at 8 GB and recommends 10 GB, and the minimum and recommended for To the Sky at 5 GB.
Why ATM10 needs this much
- Lots of content. Hundreds of mods load registries, recipes and textures into memory at start.
- Machines tick on the main thread. Tech mods like Mekanism and Create run on the same thread that runs the world. When that thread falls behind, TPS drops and no amount of extra RAM fixes it.
- Chunk generation. Exploring new land generates terrain live.
So: size RAM for the pack, then watch CPU. If memory is fine but the server falls behind, use spark (/spark tps, /spark profiler start, then /spark profiler stop) to see what costs time, and pre-generate land with Chunky (chunky radius, chunky start) so players don't generate terrain live. The same RAM-or-CPU check, step by step for an older pack, is in our RLCraft server lag fixes. Vault Hunters is in the same RAM class as ATM10, for a different reason: see how much RAM a Vault Hunters 3 server needs.
First boot takes a while
In our own provisioning check of ATM10 on an 8 GB plan, it took about 15 minutes (915 seconds) from order to the server answering a status ping. To the Sky took about 6 minutes (357 seconds) on 5 GB. These were single checks, not benchmarks, but the lesson holds: a big pack's first start is slow, so don't restart it halfway through.
ATM10 or ATM10: To the Sky?
- All the Mods 10: the full kitchen-sink pack. Best for a group that plays together for months. Needs 8 GB at the very least.
- ATM10: To the Sky: the same mod set as a skyblock start. It runs on less (5 GB minimum), and it's a good first pick if you're unsure.
What it costs on Packyard
Packyard charges $1.50 per GB of RAM per month (USD plus applicable taxes), so 5 GB is $7.50, 8 GB is $12 and 12 GB is $18. The order page shows which sizes are in stock right now. The server stays on, has a permanent address (yourserver.play.packyard.ca), and includes daily backups plus backups you make yourself in the panel, SFTP, and sub-users for friends who help run it. Available in the US and Canada (not Quebec); servers run in US West.
Run ATM10: To the Sky from $7.50 or run All the Mods 10. More on the lighter option: ATM10: To the Sky hosting. Not sure about your group? Use the RAM calculator.
All the Mods is made by its authors. Packyard is not affiliated with All the Mods, Mojang or Microsoft.
FAQ
Can ATM10 run on 6 GB?
Not well. Our order page won't sell All the Mods 10 below 8 GB. If 6 GB is your budget, pick ATM10: To the Sky.
Is 16 GB overkill?
For 2 to 5 players, yes. Extra RAM past the recommended size brings little; lag in ATM10 is usually CPU, not memory.
How do I allocate RAM to an ATM10 server?
On Packyard the plan size sets it for you. On your own machine the server uses the Java -Xmx setting in the start script; leave 1 to 2 GB free for the operating system.
Does ATM10 need a specific Java version?
It runs on Java 21 (Minecraft 1.21.1 with NeoForge). We set this up automatically; running it yourself, see which Java version a Minecraft server needs.
Which ATM10 version does a Packyard server run?
As of November 2026, new All the Mods 10 servers install the 8.3 server files (NeoForge 21.1.259, Minecraft 1.21.1). We pin the version and test it before moving to a newer one, so it can be behind the latest release on CurseForge. Everyone who joins needs the same pack version in their launcher, so pick 8.3 when you install the client.
Why does my ATM10 server lag with plenty of RAM?
Machines and chunk loading run on one thread. Profile with spark, pre-generate with Chunky, and cut idle chunk loaders.
More guides and posts on the Packyard blog.