How much RAM does a Valheim server need?
A vanilla Valheim server should have 4 GB of available RAM for a full 10-player group. Small fresh worlds can run on less; old worlds, separate exploration, and BepInEx mods need more. Compare practical 3 GB, 4 GB, 6 GB, and 8 GB sizing.
For a normal vanilla Valheim server, use 4 GB of RAM available to the server process. That is a practical target for the full official group size of 10 players. A small fresh world can run with less, while an old world, players exploring in different directions, or BepInEx mods need more headroom.
Iron Gate's official dedicated-server guide does not publish a RAM requirement. The figures below are berrybyte's practical sizing guidance, not an official Valheim specification.
Valheim RAM by server type
| Server | Practical starting RAM | When to move up |
|---|---|---|
| Fresh vanilla world, 1–4 players | 3 GB | RAM remains near the limit or players explore separately |
| Vanilla world, 5–10 players | 4 GB | Long-running world, large builds, or frequent memory pressure |
| Old or heavily explored vanilla world | 4–6 GB | Usage approaches the limit during busy sessions |
| Light BepInEx server | 6 GB | Several content mods or unexplained growth after startup |
| Large mod list or overhaul | 8 GB+ | Measure the real plugin set; there is no universal ceiling |
These amounts mean memory the Valheim process can actually use. A self-hosted machine also needs memory for Linux or Windows, SteamCMD, monitoring, and file caches. A computer with 4 GB total RAM does not give the game server 4 GB free.
Is 2 GB enough?
Two gigabytes is a bare-minimum community baseline, not an official figure from Iron Gate. A fresh world with one or two players may start in that amount, but there is almost no safety margin.
It becomes a poor choice when:
- several players connect together,
- players spread out and generate new terrain,
- the world has months of builds and explored areas,
- backups or another service run on the same machine, or
- BepInEx and plugins are installed.
For a small self-hosted group, start with at least 3 GB available to the server. For a server you expect to keep, 4 GB avoids sizing it around the quietest possible session.
How much RAM for 10 players?
Use 4 GB as the starting point for a vanilla 10-player server. Player count matters, but activity matters more than the number in the lobby. Ten players standing in one base can be easier on the server than four players sailing in different directions and generating separate parts of the world.
Move to 6 GB when:
- RAM is repeatedly close to the allocation during real sessions,
- the world is old and extensively explored,
- the group has very large or object-dense bases,
- players regularly explore separate biomes at once, or
- you add server-side plugins.
Valheim's official cap is still 10 concurrent players. Read how many players can join a Valheim server before using an unsupported mod to push beyond it.
How much RAM for mods?
There is no accurate RAM-per-mod formula. A small administration plugin and a content overhaul are both "one mod," but their memory behavior is completely different.
Use this starting point:
- 6 GB for a light, tested BepInEx setup.
- 8 GB or more for a large mod list or content overhaul.
- More only after measuring usage with the exact world, players, and plugins.
Install one plugin at a time and check BepInEx/LogOutput.log after every
restart. If memory grows continuously even while no players are online, find
the broken plugin instead of endlessly adding RAM. See how to install BepInEx
mods.
Console players cannot install BepInEx or required client-side plugins. If your group includes PS5, Switch 2, or Xbox, keep the server vanilla and use crossplay rather than buying extra RAM for a mod setup those players cannot join.
RAM is not the only bottleneck
More memory fixes a server that is exhausting its allocation. It does not fix every Valheim performance problem.
| Symptom | Check before adding RAM |
|---|---|
| Rubber-banding while exploring | CPU single-thread speed and network latency |
| Stutter during world saves | CPU and storage latency |
| Players cannot connect after 1.0 | Client/server version, current join code, and crossplay |
| Crash immediately after an update | BepInEx and plugin compatibility |
| RAM climbs without stopping | A leaking or broken plugin |
| Server disappears entirely | Startup log, password rules, and process status |
Valheim world generation and simulation benefit from strong single-thread CPU performance. NVMe storage also shortens writes and backup work. Do not choose a weak CPU merely because the machine advertises a large memory number.
Check whether you need more
Measure during a real session
Check memory with most of the group online, preferably while players are exploring and building. Idle usage alone does not size the busy case.
Leave headroom
Do not wait for the process to hit the allocation and be killed. Repeatedly running near the limit is enough reason to move up.
Rule out a broken mod
If usage grows continuously, stop the server and test without recently added plugins. More RAM only delays a leak.
Change one thing
Increase the allocation or remove the suspect mod, then repeat the same test. Changing both hides which one solved the problem.
Every berrybyte Valheim plan is sized for a vanilla 10-player world and includes a modern CPU, NVMe storage, automatic updates, and backups. Start a properly sized Valheim server, then use the dashboard resource graphs to see the real workload rather than guessing.
Understand the official 10-player cap and what counts as an occupied slot.
Fix connection problemsRAM will not fix a version, join-code, crossplay, password, or allowlist failure.
Set up a Valheim serverConfigure vanilla or self-hosted Valheim with the right launch flags.
Start a hosted serverA 10-player plan with suitable hardware, backups, and updates included.
Frequently asked questions
How much RAM does a Valheim server need?
For a vanilla Valheim server, 4 GB of available RAM is a practical target for a full group of up to 10 players. A small fresh world may run in 3 GB, while a long-running world or a group exploring in separate directions may benefit from 6 GB. Iron Gate does not publish an official RAM minimum for the dedicated server.
Is 2 GB of RAM enough for a Valheim server?
It can be enough for a bare, fresh server with very few players, but it leaves little room for the operating system, world growth, backups, or usage spikes. Use at least 3 GB available to the server for a small group and 4 GB for a normal vanilla group.
How much RAM does a 10-player Valheim server need?
Start with 4 GB of RAM available to the Valheim process for a vanilla 10-player world. Move to 6 GB if the world is old, players explore far apart, the process approaches its limit, or you add light server mods.
How much RAM does a modded Valheim server need?
Start around 6 GB for a light BepInEx setup and 8 GB or more for a large mod list or content overhaul. There is no universal modded requirement because plugins vary widely and a broken plugin can leak memory regardless of the allocation.
Does adding more RAM stop Valheim server lag?
Only when the server is actually running out of memory. Rubber-banding during exploration or world saves is often limited by CPU single-thread performance, storage, network quality, or a broken mod. Check CPU and RAM usage before upgrading.