Satisfactory 1.0 ships with an officially supported dedicated server. After years in early access, multiplayer is more stable than ever, but the server is hungry: large factories demand significant memory and CPU. Here is what you need to know.
System requirements
- RAM: 6 GB minimum, 8 to 12 GB recommended. Large factories with thousands of machines and conveyor belts consume more. A late-game mega factory save can push past 16 GB.
- CPU: fast single-thread performance matters more than core count. Satisfactory runs the factory simulation largely on a single thread.
- Storage: 5 to 10 GB for the server files. Save files grow to hundreds of megabytes as your factory expands.
- Ports: 7777 UDP (game), 15000 UDP (beacon), 15777 UDP (query).
Configuring the server
After the first start, open the Server Manager through a web browser:
- Navigate to
https://server-ip:7777(yes, HTTPS on the game port). - Set an admin password.
- Give the server a name.
- Create a new game or upload an existing save.
Most settings are accessible through the Server Manager interface. For advanced configuration, edit ServerSettings.ini in the server's config directory.
Uploading an existing save
Your local saves on Windows live in %LOCALAPPDATA%/FactoryGame/Saved/SaveGames/. Upload the .sav file via SFTP to the server's save directory. In the Server Manager, select the uploaded save to load it.
Connecting
In Satisfactory, open the multiplayer menu. You can browse the server list, or connect directly by entering the server IP under "Join via IP/Port". The Server Manager also provides a join link you can share with friends.
Performance tips
- Reduce conveyor sprawl: every conveyor belt carrying items is a calculation the server runs each tick. Use Smart Splitters and manifold designs instead of long spaghetti lines.
- Tick rate: defaults to 30. Lowering it to 20 can help with very large factories, but makes the simulation feel less smooth.
- Daily restarts: Satisfactory servers accumulate memory over long sessions. A scheduled daily restart keeps things stable.
- Monitor memory usage: if the server starts swapping to disk, performance drops sharply. Upgrade RAM before the factory outgrows the plan.
Mods
Satisfactory supports mods through the Satisfactory Mod Manager (SMM) or through manual installation. Most mods require all players to install the same set. Popular server-side mods include Refined Power, FICSIT Networks and Area Actions. Always check mod compatibility with the current game version after updates.
Dealing with large saves
As your factory grows, save files get bigger and load times increase. A few things help:
- Remove unused structures and conveyor belts you no longer need.
- Consolidate production lines instead of building duplicate setups.
- Use NVMe storage on the server. The difference in save and load times compared to traditional drives is significant.
How many players can a server handle?
Satisfactory supports up to 4 players per session. This is a game design choice, not a server limitation. Mods can raise the cap, but stability declines noticeably with more players.
Does the factory keep running when nobody is online?
No. The server simulates the factory only while at least one player is connected. Without players, production stops. When someone reconnects, the server calculates what would have been produced in the meantime, up to a limit.
Can I switch between singleplayer and the dedicated server?
Yes. Upload your singleplayer save to the server and continue where you left off. Going the other way works too: download the server save and load it locally. The save format is the same.
A Satisfactory server runs well on a KVM VPS with at least 8 GB RAM.
