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For a Rust dedicated server, Facepunch’s setup guide lists 12 GB of free RAM and 15 GB of free disk space as the starting baseline. Use an SSD or NVMe drive, and plan a faster CPU as you raise the maximum player count. Those figures are not a universal guarantee: map size, concurrent players, plugins and other server workloads change the real requirement.
What the official Rust requirements actually mean
Facepunch’s dedicated-server documentation gives two concrete starting figures: 12 GB of free RAM and 15 GB of free disk space. “Free” means resources available to the server after the operating system and other services have taken their share; it does not necessarily mean the machine only needs 12 GB of installed memory. The same guide says requirements vary with use and population.
| Resource | Facepunch guidance | How to interpret it |
|---|---|---|
| Memory | 12 GB free RAM | Starting point for the server, not a promise for every map, plugin set or player count. |
| Storage | 15 GB free disk space | Minimum free-space figure in the setup guide; larger maps need more. |
| Storage type | SSD/NVMe highly preferred | Use solid-state storage for better loading and save behavior; no specific model or interface speed is mandated. |
| World size | Documented range: 1,000 to 6,000 | A 6k world uses more memory, and larger worlds require more disk space. |
| CPU | More simultaneous players require a faster CPU | Facepunch does not publish a universal processor model, clock speed, core count or benchmark. |
These are technical specifications published by Facepunch Studios, not results from a performance study. They should be treated as a capacity baseline that you validate against your intended configuration.
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Use 12 GB free RAM as the initial target
A fresh installation with a modest population can be planned around Facepunch’s 12 GB free-RAM figure. Leave operating-system headroom rather than allocating every installed gigabyte to the Rust process. Monitoring should show how much memory remains while the server is running, during map generation, and during busy periods.
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Map size changes memory demand
Facepunch specifically warns that a 6k map uses more memory. The documentation also states that requirements depend heavily on use and population. There is no official formula that converts world size and player count into an exact RAM number, so a precise table claiming “X GB per player” should be treated as a third-party estimate, not as a Facepunch requirement.
If your plan uses a 6,000-size world, a high concurrent population, or a large plugin stack, regard 12 GB as a floor for planning rather than a guaranteed operating point. Start with the official baseline, observe peak usage, and increase the allocation when the operating system begins paging or the server approaches its memory limit.
What consumes memory besides players
- World data and procedural-map state, especially on larger maps.
- Connected-player state and the higher entity activity created by a busy population.
- Plugins, custom events and other server extensions.
- Operating-system services, monitoring tools, backups and control panels sharing the machine.
Because those variables differ between communities, capacity should be checked under the same map, plugins and expected peak population you will use in production.
What CPU does a Rust server need?
Facepunch’s direct rule is: “The more players, the faster your computer CPU needs to be.” That is the official relationship to use when selecting hardware. The guide does not name a minimum processor generation, frequency, core count or benchmark score, so there is no defensible universal answer such as a particular Intel or AMD model.
Size the processor for peak concurrent players
Set the maximum-player value you actually intend to allow, then choose a hosting tier whose CPU performance is documented for that capacity. A server capped at a small private-group population has a different CPU requirement from a public server designed for a large queue. Raising the cap without reassessing CPU headroom can turn an otherwise adequate machine into the bottleneck.
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Do not confuse server and client requirements
Rust’s player-game requirements page describes the computer used to run the game client. Those recommendations are not dedicated-server specifications. Using a client “minimum” as the server CPU standard can lead to an undersized host, particularly when many players connect at once.
Signs that CPU capacity is the limiting factor
- Tick or frame-time warnings coincide with high player activity while memory remains available.
- Server simulation becomes less responsive as the population approaches the configured maximum.
- Reducing the player cap or intensive plugin activity improves responsiveness without changing RAM.
These observations do not produce a universal benchmark, but they identify when a faster CPU tier is more useful than simply adding storage.
Storage: capacity, SSDs and NVMe
The setup guide lists 15 GB of free disk space and says SSD/NVMe storage is highly preferred. The free-space figure covers the documented starting point, not every future map, backup, log file or plugin. Facepunch also notes that larger maps need more disk space.
Why solid-state storage matters
Rust servers repeatedly read and write world, save and log data. An SSD or NVMe drive reduces storage latency compared with a mechanical disk and is the storage class Facepunch recommends. The documentation does not require a particular drive model, capacity, interface generation or advertised speed rating.
Plan free space beyond the installation
- Reserve room for the server files and generated world.
- Allow growth for larger maps and map changes.
- Account for logs, configuration copies and any backups you retain locally.
- Keep emergency headroom so updates and world saves do not fail when the disk is nearly full.
An NVMe drive is therefore a sensible component for a self-hosted machine, but no specific NVMe product is mandatory.
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Self-hosting: installation and network requirements
Facepunch documents SteamCMD for installing and updating the dedicated server on both Windows and Linux. The Rust application identifier is 258550. A self-hosted deployment also requires firewall and router work so players can reach the server.
Deployment sequence
- Prepare the host. Use a machine with at least the official free-resource baseline, preferably on SSD/NVMe, and keep the operating system updated.
- Install SteamCMD. Follow Facepunch’s Windows or Linux procedure and use App ID 258550 to download or update the Rust server files.
- Choose the world and capacity. Set the map type, seed, world size, maximum players and a unique server identity. The documented world-size range is 1,000–6,000.
- Assign network ports. Configure a UDP game/server port and a separate UDP query port. They cannot be the same port. The query port is what enables server-browser visibility.
- Configure administration. RCON uses TCP, so assign and protect its TCP port separately from the UDP game and query ports.
- Open the host firewall. Permit the selected UDP game and query ports and the TCP RCON port only as required by your administration setup.
- Forward ports at home. If the machine is behind a home router, forward the selected ports to its local address. Facepunch says this will most likely be needed for outside connections.
- Test externally. Check that the server appears in the browser through the query port and that a player outside your local network can connect. A local-only test does not prove that internet routing is correct.
Core startup values
The official examples cover values such as these. Use the current Facepunch guide for exact syntax and defaults because server software changes:
+server.level <map type>
+server.seed <seed>
+server.worldsize <1000-6000>
+server.maxplayers <maximum players>
+server.identity <unique identity>
+rcon.port <TCP port>Keep the game and query ports on UDP, keep RCON on TCP, and never assign the same port number to the game and query services.
Rented or dedicated hosting versus running your own machine
Renting capacity removes much of the hardware and network administration, but it does not remove sizing decisions. Select an allocation that matches your map, expected population, plugins and geographic audience. Facepunch’s advanced hidden-server guidance recommends a dedicated server with strong DDoS protection for that use case; it is guidance for that scenario, not a current ranking of commercial hosts or plans.
| Decision point | Self-hosted machine | Rented or dedicated host |
|---|---|---|
| CPU | You choose and maintain the processor; leave headroom for other services. | Compare the provider’s stated CPU allocation or performance tier against your peak player cap. |
| RAM | You control the installed memory and what remains free after the OS. | Verify the guaranteed allocation, not just a maximum advertised amount. |
| Storage | You select capacity and SSD/NVMe media. | Check free space, drive type and whether backups consume the same allocation. |
| Network | You configure firewall rules, router forwarding and upstream bandwidth. | Check port access, network controls, region and DDoS protection. |
| Administration | You handle SteamCMD updates, restarts, backups and recovery. | Check panel controls, scheduled tasks, backup policy and support response. |
| Location | Usually determined by where your machine and internet connection are. | Choose a region close to most players to reduce latency. |
No official source supplies an apples-to-apples benchmark or current provider pricing. Compare published specifications and service terms rather than assuming a named host is best for every community.
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If you would rather not run your own machine, Godlike.Host’s Rust server hosting runs on a Pterodactyl-based game panel with a task scheduler and up to three free backups a day with restore. It includes free DDoS protection and 10 locations, including US East Coast, Germany and Singapore, so you can pick a region close to your players. You can upgrade or downgrade from the panel with prorated billing; see the current plans.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.A practical capacity-planning method
1. Define the workload
Write down the intended maximum concurrent players, world size, map type, plugins, restart policy and whether backups or other applications share the host. These variables are more useful than a generic “Rust server” label.
2. Start from the documented floor
Use 12 GB free RAM and 15 GB free disk space as the initial reference, with SSD/NVMe preferred. A 6k world or a larger player population should trigger a deliberate headroom review rather than an assumption that the baseline is sufficient.
3. Match CPU to the player cap
Use the maximum simultaneous-player target as the primary CPU decision. If a provider does not explain its CPU allocation or performance tier, ask for that information before committing.
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4. Validate under peak conditions
Generate or load the intended world, connect representative players, enable the production plugin set and observe CPU utilization, available memory, disk latency and free space. Test during the busiest expected period, not only immediately after startup.
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5. Adjust one constraint at a time
If memory is exhausted, increase RAM or reduce the world/plugin workload. If CPU is saturated while memory remains comfortable, move to a faster CPU tier or lower the player cap. If loading and saves are slow, verify that the server is on SSD/NVMe and that the disk is not nearly full.
Common failures and fixes
The server starts but is not visible in the browser
Check that the query port is configured as UDP, is different from the game port, and is allowed through the host firewall and home-router forwarding. A server can accept local connections while remaining invisible externally if the query path is blocked.
Players outside the home network cannot connect
Confirm that the game/server UDP port is forwarded to the correct internal address and permitted by the firewall. If the internet connection uses carrier-grade NAT or blocks inbound traffic, router rules alone may not provide a reachable public endpoint; a hosted machine or another publicly reachable network may be necessary.
The process runs out of memory on a large map
A 6k map is explicitly more memory-intensive, and plugins and population add further demand. Check peak memory usage, preserve operating-system headroom, then increase RAM or choose a smaller world and lighter plugin set.
Simulation becomes slow as the server fills
Facepunch links higher maximum-player capacity with the need for a faster CPU. Reduce the configured cap for a quick mitigation, then move to a stronger CPU allocation if the target population is essential.
Updates or saves fail despite having installed the server
Verify that at least 15 GB remains free after the world and logs are present, and leave additional space for larger maps, backups and update files. Running out of free space can prevent normal writes even when the original installation succeeded.
Quick Recap
Final deployment checklist
- At least 12 GB of RAM is free for the server workload, with extra headroom for the OS and extensions.
- At least 15 GB of disk space is free, with additional capacity reserved for map growth, logs and backups.
- The server is on SSD/NVMe storage when possible.
- The CPU tier is chosen for the intended maximum concurrent players.
- The map size, seed, identity and player cap are explicitly configured.
- The UDP game and query ports are distinct, reachable and forwarded when necessary.
- RCON uses TCP and is separated from the UDP services.
- SteamCMD updates use Rust App ID 258550.
- Peak-load monitoring has confirmed memory, CPU, storage and network headroom.
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