Astroneer Dedicated Server Requirements: RAM, CPU and Storage

There is no published System Era minimum specification for the ASTRONEER dedicated-server process. For a practical self-hosted Windows machine, plan around a quad-core processor at 2.4 GHz or faster, 4 GB of RAM as a floor, 8 GB as the sensible target, about 4 GB for the game files, and at least 10 GB for the operating system. Keep extra capacity for saves, logs, updates, and backups. Those figures come from IONOS guidance, not an official System Era guarantee. Steam’s 4 GB RAM and 2 GB storage figures describe the game client and must not be treated as server requirements.

Does System Era publish minimum Astroneer dedicated-server requirements?

No. System Era’s current dedicated-server guides explain installation, configuration, ports, saves, ownership, and platform support, but they do not state a minimum CPU, RAM, or storage specification for the server process. That means any hardware number presented as an official server minimum is overstated.

The safest way to plan is to separate three kinds of information:

• Official server documentation: confirms how to install and operate the server, but does not define a hardware floor.
• Third-party planning guidance: IONOS recommends a quad-core 2.4 GHz-or-faster processor, 4 GB RAM minimum, 8 GB recommended, 4 GB for game files, and 10 GB for the operating system.
• Steam client specifications: Steam lists a 2+ GHz dual-core CPU, 4 GB RAM, and 2 GB available storage minimum; its recommended client specification is a 3+ GHz quad-core CPU, 8 GB RAM, and 4 GB storage.

The Steam figures describe the computer running the game, not the dedicated server. They are useful context for a player PC but do not guarantee that a server with those specifications will perform well.

How much RAM does an Astroneer dedicated server need?

Use 4 GB as a practical minimum and 8 GB as the better starting point for a self-hosted server. IONOS published those figures in 2025 as planning guidance; System Era has not confirmed them as official requirements.

Use case	RAM guidance	What it means
Small test or lightly used world	4 GB minimum	Leaves little room for the operating system, background services, updates, or several simultaneous players.
Normal self-hosted starting point	8 GB recommended	Provides useful headroom for Windows, the server process, saves, logs, and routine maintenance.
Heavier workloads	Not officially specified	Measure actual memory use and increase capacity rather than assuming a published player-to-RAM ratio.

Do not interpret “8 GB recommended” as proof that every world or player count needs exactly 8 GB. System Era does not publish a scaling formula. If the machine also runs voice chat, backups, monitoring, or another game, those services consume the same memory pool.

What CPU, operating system, and internet connection should I use?

CPU

IONOS’s practical baseline is a quad-core processor running at 2.4 GHz or faster. A four-core CPU gives the server and Windows more scheduling room than the Steam client minimum of a 2+ GHz dual-core processor. Clock speed alone is not a guarantee: an older architecture, power-saving laptop mode, or heavy background workload can reduce available performance.

Operating system

IONOS lists Windows Server 2016, Windows Server 2019, and Windows Server 2022 for its planning baseline. System Era’s installation instructions describe the Windows server directory and configuration files. They do not establish a Linux minimum in the cited guides, so use a supported Windows environment unless you have independently verified another platform.

Internet upload

IONOS recommends at least 10 Mbps upload and a stable connection. Bandwidth is only one part of the requirement: packet loss, high latency, restrictive carrier-grade NAT, or a connection that changes its public address can prevent players from reaching the server even when the download speed looks adequate.

Storage

Reserve approximately 4 GB for the game files and 10 GB for the operating system, following IONOS’s baseline. Treat that 14 GB as a starting allocation, not a complete disk plan. Add room for world saves, log growth, downloaded updates, temporary files, and at least one backup copy. A small SSD is preferable to a nearly full mechanical disk because updates and save operations need working space, but no official storage-performance requirement is published.

Should I self-host or rent an official server?

Self-hosting avoids a recurring rental bill but makes you responsible for hardware, Windows updates, firewall rules, router forwarding, backups, and troubleshooting. Renting transfers those tasks to a provider and usually gives you a control panel, but adds a recurring fee and limits your control over the underlying machine.

Decision factor	Self-hosted Windows machine	Official rental hosting
Upfront cost	Requires a suitable PC or server and an internet connection.	No server hardware purchase; payment is recurring.
CPU, RAM, and disk headroom	You choose and can upgrade components.	Limited to the provider’s plan; check the allocated resources.
Networking	You must allow the game port in the firewall and forward it on the router.	The provider normally handles the public network path.
Operating-system maintenance	You install patches, protect the machine, and manage reboots.	The host manages the underlying service to the extent stated in its plan.
Support	Your responsibility, including diagnosing connection and save problems.	Provider support may help with service-level issues.
Platform and cross-play	Follow System Era’s dedicated-server and platform rules.	Prefer a provider listed by System Era when platform eligibility matters.
Partner status	Not applicable.	System Era names Nitrado and GPORTAL as official dedicated-server partners.

Choose self-hosting when you already have a reliable Windows machine and are comfortable administering a network service. Choose an official partner when predictable availability, simpler setup, or cross-platform access is more important than maximum control.

How do I install an Astroneer dedicated server?

System Era documents two installation routes: Steam’s Tools library or SteamCMD. The following sequence keeps the official paths and file locations intact.

1. Install the server application. In the Steam client, open Library > Tools, locate ASTRONEER Dedicated Server, and install it. For a command-line installation, use SteamCMD with app ID 728470.
2. Stop the server before editing. Launch it once if necessary to create its folders, then shut it down completely before changing configuration. System Era warns: “DO NOT MODIFY .INI FILES WHILE THE SERVER IS RUNNING. CHANGES TO THE .INI WHILE THE SERVER IS RUNNING WILL NOT GET SAVED.”
3. Open the configuration directory. The documented Windows path is ASTRONEER DEDICATED SERVER > ASTRO > SAVED > CONFIG > WINDOWS SERVER.
4. Identify the two configuration files. The server uses Engine.ini and AstroServerSettings.ini. Make a backup copy before changing either file so you can restore a known-good configuration.
5. Set the listening port. In the [URL] section of Engine.ini, the official example uses Port=8777.
6. Configure server identity and access. Depending on your setup, the settings can include PublicIP, OwnerName, and OwnerGuid=0. System Era explains that the first player whose Steam name matches the configured owner name becomes the owner.
7. Start the server only after saving the files. Confirm that the process remains running and that the expected save and log directories are created.
8. Test from a second connection. A player outside the host machine’s local network is the most useful test because it checks the firewall, router forwarding, and public address together.

Which ports and firewall rules does the server use?

The official example uses port 8777, and that port must be allowed through the host firewall and forwarded on the router when you self-host behind a home gateway. IONOS also lists TCP/UDP 27015 as a Steam port. Apply the protocol and port rules required by your installation, then test externally rather than assuming that a local connection proves the service is reachable.

• Create inbound firewall rules for the server’s game traffic on port 8777 using the protocols required by your configuration.
• Forward the same port from the router’s public interface to the Windows machine’s fixed local address.
• Allow the Steam port listed by your hosting instructions when Steam discovery or authentication requires it; IONOS identifies TCP/UDP 27015.
• Keep Windows Defender Firewall and the router rule aligned. A rule on only one device will not open the complete path.
• If your internet provider uses carrier-grade NAT, ordinary port forwarding may not provide a publicly reachable address; use a public-IP service or hosted server instead.

Do not expose unrelated administrative ports. Restrict remote-management access separately and keep the operating system patched.

How do I use an existing Astroneer save?

Copy the existing save into the server’s Astro/Saved/SaveGames folder. Then set ActiveSaveFileDescriptiveName to the part of the save filename that appears before the $ timestamp separator. Stop the server before copying or changing files, retain the original save as a backup, and start the server only after the filename setting matches the copied world.

If the world does not appear, check the folder spelling, the exact text before the dollar sign, file permissions, and whether the server is reading the same installation directory that you edited. Never test a migration without preserving an untouched copy of the original save.

Can Xbox, PlayStation, and Steam players join the same dedicated server?

System Era’s current guide says Xbox and PC players can connect through a preferred dedicated server and that PlayStation 4 players can connect to dedicated servers. System Era’s partner announcement describes cross-play among PlayStation, Xbox, Windows 10, and Steam for its official dedicated-server offering.

Cross-play eligibility does not remove the need for a reachable server, compatible game versions, or a correctly configured provider. If console access is essential, verify the provider’s current platform support and prefer a host that System Era lists as an official partner. A launch-era System Era announcement referred to servers supporting up to eight players; that is historical launch context, not a current capacity guarantee.

How should I size a server when the official numbers are missing?

Start with the 8 GB, quad-core baseline, then observe the machine under the real workload. Because System Era does not publish a CPU, RAM, or player-count formula, measurement is more reliable than extrapolating from the client specification.

Use a conservative first deployment

• Allocate 8 GB RAM if the machine will host the server continuously.
• Use a quad-core 2.4 GHz-or-faster CPU with spare capacity for Windows and maintenance tasks.
• Reserve more than the 4 GB game-plus-10 GB operating-system estimate so updates and backups cannot fill the disk.
• Schedule backups and monitor free disk space, RAM use, CPU load, and connection stability.

Increase resources based on symptoms

• Persistent memory pressure or paging indicates that the host needs more RAM or fewer background services.
• Consistently saturated CPU during play suggests a faster processor or a less busy host.
• Failed updates or save errors alongside low free space require disk cleanup or a larger volume.
• Rubber-banding and disconnects with low CPU use point first to latency, packet loss, firewall, or routing rather than immediately buying more hardware.

What commonly goes wrong during setup?

Players cannot connect

Confirm that the server is running, port 8777 is allowed in Windows Firewall, the router forwards it to the correct local address, and the public address in the configuration is current. Test from outside the home network; two devices on the same LAN can connect even when internet forwarding is broken.

Configuration changes disappear

Stop the server before editing either INI file. System Era explicitly states that changes made while the process is running will not be saved. Edit, save, verify the file path, and then restart.

The wrong world loads

Recheck the filename text before the $ timestamp and confirm that the save is under Astro/Saved/SaveGames for the installation that is actually launching.

The server runs out of disk space

Keep free space beyond the initial 14 GB allocation, rotate old logs, and store backups on another volume or machine. A full system disk can affect Windows updates as well as the game server.

Console players cannot join

Check the host’s current platform policy and game-version compatibility. A generic Windows server listing is not automatically proof of console or cross-play support; System Era’s official partner status is the stronger signal to verify.

What is the practical buying and hosting checklist?

• Quad-core CPU at 2.4 GHz or faster.
• 8 GB RAM target; 4 GB only for a constrained, lightly used setup.
• At least 4 GB for game files plus 10 GB for Windows, with additional space for saves, logs, updates, and backups.
• Stable internet with IONOS’s suggested 10 Mbps upload or better.
• Windows Server 2016, 2019, or 2022 for the IONOS planning baseline.
• Port 8777 configured in the server and opened through the firewall and router.
• Steam port 27015 considered where the hosting setup requires it.
• Backups made before migrating or modifying a world.
• Current platform and cross-play support confirmed with the host.

Frequently Asked Questions

Do I really need 8 GB of RAM for a small Astroneer server?

Not necessarily. Four gigabytes is the published third-party floor, but 8 GB leaves substantially more room for Windows, updates, logs, and other services; the game developer has not published a workload-based requirement.

Can I host the server behind a home internet connection?

Yes, if the connection accepts inbound traffic and you can forward the required ports to the host computer. Carrier-grade NAT, changing public addresses, or blocked inbound traffic can make a rented server the simpler option.

Is the eight-player figure still the current server limit?

It comes from a historical launch announcement, so it should not be treated as a current universal limit. Check the current server documentation or the provider’s plan before promising a specific capacity.

Does meeting Steam’s recommended PC specification guarantee good server performance?

No. Steam’s specification is for running the Astroneer client. Dedicated-server performance also depends on the Windows workload, networking, save activity, and resources consumed by other services on the host.