Cobblemon Server RAM: How Much You Need (2026)
Published
Short answer: 6 GB for 2 to 5 players on the official Cobblemon modpack, 8 GB for 6 to 10, and the same 6 GB floor for Cobbleverse, with 8 to 10 GB for a bigger group. The pack itself is light; what fills the memory is your players exploring.
Most guides say "6 to 8 GB" without showing where that comes from. Below is what we measured on our own servers, what our order page sells, and the settings that matter more than RAM once your server is running.
RAM by pack and group size
| Players online at once | Cobblemon (Fabric or NeoForge) | Cobbleverse |
|---|---|---|
| 2 to 5 | 6 GB | 6 GB |
| 6 to 10 | 8 GB | 8 to 10 GB |
| 10 to 20 | 10 to 12 GB (estimate) | 12 GB (estimate) |
The first two rows are the sizes our order page uses. The 10 to 20 row comes from our modpack RAM guide, which pools pack listings and public host guides with our rule of thumb of about 1 GB per 3 extra players; it's an estimate, not a benchmark.
What we measured
On 19 October 2026 we booted the official Cobblemon modpack (Fabric, Minecraft 1.21.1) on a 5 GB test server and read its memory once it had settled: 1.32 GiB used out of 5.25 GiB, with nobody online on a fresh world. So the pack itself fits easily. The rest of a plan is headroom for what players add:
- Each player loads their own chunks. Spread out and you hold many more chunks in memory than one group standing together.
- Cobblemon spawns Pokémon around every player. More players spread out means more entities loaded and ticking.
- Exploring generates new terrain, which uses memory and CPU while it happens.
An idle reading is not a full-load benchmark, and we don't claim it is. It tells you the floor: the pack is not what fills your RAM; your players are. That's why our order page starts Cobblemon at 6 GB rather than at the idle number.
First boot is also quick for a modpack. In our checks the Fabric pack answered a status ping 190 seconds after the order, the NeoForge build in 316 seconds and Cobbleverse in 347 seconds.
Fabric or NeoForge?
Cobblemon ships as two official modpacks on Modrinth, both version 1.8.4 (released 27 October 2026) for Minecraft 1.21.1 and both on Java 21:
- Cobblemon Official Modpack (Fabric): the one most players have installed. Pick this unless your group already uses NeoForge.
- Cobblemon Official Modpack (NeoForge): the same Cobblemon on NeoForge. Pick it if you want to add NeoForge-only mods.
RAM is the same for both: 6 GB for a small group. What matters is that every player uses the same build as the server. A Fabric client can't join a NeoForge server, and the other way around. That mismatch is the most common "why can't my friend join" problem; our Cobblemon server guide covers the other causes.
Cobbleverse: same floor, bigger groups need more
Cobbleverse (version 1.7.42, Fabric 1.21.1) adds new regions, quests and extra content on top of Cobblemon. It starts at the same 6 GB, but there's more to load and more to generate, so 8 to 10 GB is a better fit for 6 to 10 players. The full setup is in how to make a Cobbleverse server. If you're choosing between packs, see the best Cobblemon modpacks.
When it lags but RAM looks fine
If memory isn't near full and the server still stutters, more RAM won't help. Minecraft runs the world on one main thread, and Cobblemon's spawner runs there too. Three things to try, in this order:
1. See what's slow. Install spark and run /spark tps, then /spark profiler start, play for a few minutes, and /spark profiler stop. The report shows whether the time goes to entities, chunk loading or a specific mod.
2. Tune Cobblemon's spawner. Stop the server, then open config/cobblemon/main.json. These keys are in Cobblemon 1.8.4, unchanged since 1.8.2 (defaults in the second column):
| Key | Default | What lowering or raising it does |
|---|---|---|
pokemonPerChunk | 1 | Lower it (e.g. 0.75) for fewer wild Pokémon per loaded chunk |
maximumSpawnsPerPass | 8 | Lower it to cap how many spawn in one go |
ticksBetweenSpawnAttempts | 20 | Raise it (e.g. 40) to try spawning half as often |
despawnerMaxAgeTicks | 3600 | Lower it so unattended wild Pokémon despawn sooner |
Change one at a time, start the server, and check /spark tps again. Small changes are enough; set them too low and the world feels empty.
3. Pre-generate the world. Use Chunky on Fabric or NeoForge (/chunky radius 2000, then /chunky start) before your group starts exploring, so new terrain isn't generated while people play.
Running it yourself? Set the heap with -Xmx in the start script (for example -Xmx6G) and leave 1 to 2 GB free for your operating system, more if you also play on the same PC.
What it costs on Packyard
Packyard charges $1.50 per GB of RAM per month (USD, plus applicable taxes): 6 GB is $9 and 8 GB is $12. You pick Cobblemon (Fabric or NeoForge) or Cobbleverse when you order and we install it with the right loader and Java. Your friends join at yourserver.play.packyard.ca, an address that stays the same, and you get daily backups plus your own backups from the panel, SFTP, and sub-users for friends who help run it. The order page shows which sizes are in stock. Open to the US and Canada (outside Quebec); servers run in US West.
Start a Cobblemon server on Packyard, 6 GB for $9 a month. More on the hosting: Cobblemon server hosting. Bigger group or extra mods? Try the RAM calculator.
Cobblemon and the Cobblemon modpacks belong to their authors. Packyard is not affiliated with Cobblemon, The Pokémon Company, Mojang or Microsoft.
FAQ
Can a Cobblemon server run on 4 or 5 GB?
It can start, since the pack used about 1.3 GiB at idle in our test, but that leaves little room once a few players explore. Our order page won't sell Cobblemon below 6 GB.
How much RAM per player on Cobblemon?
As a rule of thumb, about 1 GB for every 3 extra players beyond a small group. Spread-out players cost more than players who stay together, because each loads their own chunks and spawns.
Is 16 GB too much for Cobblemon?
For under 10 players, yes. Past the recommended size, extra RAM brings little. Lag on Cobblemon is usually the main thread (spawns, entities, terrain generation), not memory.
Does Cobblemon need a specific Java version?
Yes. Cobblemon 1.8.4 runs on Minecraft 1.21.1, which needs Java 21.
Does the NeoForge version need more RAM than Fabric?
Not in any way that changes the size you pick. Both official packs start at 6 GB on our order page.
Can I add more mods to the Cobblemon pack?
Yes, with SFTP or the panel's file manager. Every player then needs the same mods in their client, and heavy additions mean you should size up toward 8 GB.
More guides and posts on the Packyard blog.