Satisfactory server RAM: how much do you need?
No game on this site costs more per player than Satisfactory, and even so, the factory outweighs the people in it.
Recommendation
You need a server with at least
6GB
- Engine / Base OS:
- 4 GB
- Player Overhead:
- +1.2 GB
- Estimated Raw Usage:
- 5.2 GB
- Suggested cores:
- 4
- Disk to allow:
- 15 GB+
Belt and machine simulation is continuous and single-thread heavy. This is the game most likely to become CPU-bound before it runs out of memory.
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What uses the memory in Satisfactory
Every belt, splitter, machine and item moving along a line is simulated all the time, whether players are online or not. By late game a factory running thousands of machines can use several times what the same four-player server needed in its opening hours, because the requirement follows what has been built rather than who is logged in.
Satisfactory server RAM by player count
The calculator above, run for 3 common sizes. Each figure is rounded up to a plan size people actually sell.
| Players | Early/Mid Game Factory | Mega Factory (Late Game) |
|---|---|---|
| 2 | 6 GB | 12 GB |
| 4 | 6 GB | 12 GB |
| 8 | 8 GB | 16 GB |
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Where people get it wrong
Picking a size in the early game. Your server will never again be as cheap as it is in those first few hours, so size for the factory you are planning to end up with — otherwise you will be migrating halfway through the playthrough.
Clock speed before memory
Satisfactory is the game on this site most likely to run out of CPU before it runs out of memory. Belts and machines are simulated continuously on a few busy threads, so a late-game factory needs a processor with high single-core speed far more than it needs extra cores or extra gigabytes. If the server stutters while memory use looks fine, a faster CPU is the upgrade that helps.
Saves and disk
The server keeps its saves under the account that runs it: in %LocalAppData%\FactoryGame\Saved\SaveGames\server on Windows and in ~/.config/Epic/FactoryGame/Saved/SaveGames/server on Linux. A late-game save is much larger than an early one, and autosaves are written in rotation alongside your manual saves, so allow room for several copies of your biggest save rather than one. Disk speed matters too: a slow disk turns every autosave into a visible hitch.