7 Days to Die server RAM: how much do you need?
Every seventh night 7 Days to Die hits a memory peak you can see coming, and that peak — not a typical evening — is what the server has to survive.
Recommendation
You need a server with at least
6GB
- Engine / Base OS:
- 4 GB
- Player Overhead:
- +1.6 GB
- Estimated Raw Usage:
- 5.6 GB
- Suggested cores:
- 4
- Disk to allow:
- 15 GB+
Horde night is the peak — zombie pathfinding is what saturates the CPU, not normal play.
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What uses the memory in 7 Days to Die
Its voxel terrain is destructible everywhere, so each dug hole and each placed block is a lasting change the server keeps track of. Layered on that slow growth, the Blood Moon drops a big horde of zombies into the world at once, each simulated individually, which makes horde night the true high-water mark.
7 Days to Die 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 | Vanilla map | Darkness Falls / Overhauls |
|---|---|---|
| 8 | 6 GB | 12 GB |
| 15 | 8 GB | 16 GB |
| 30 | 12 GB | 24 GB |
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Where people get it wrong
Sizing for the average. A server that coasts through six days can run out of memory on day seven and corrupt the save on its way down. Overhauls like Darkness Falls push up both the everyday level and the horde-night peak by a wide margin.
Settings that move the peak
A few settings decide most of the load. WorldGenSize in serverconfig.xml sets how big a random world is, and bigger maps need much more memory, as well as much longer to generate. MaxSpawnedZombies, 64 by default, caps how many zombies exist at once on an ordinary day. How many zombies each player draws on horde night is a sandbox option, and since V3.0 it lives inside the SandboxCode rather than a line of its own; either way, the night's peak grows with the number of players online when it starts.
Disk: the world and the save
A random world is generated once and stored in its own folder, and the game save that records everything built and destroyed sits separately, under Saves in the game's data folder: %AppData%\7DaysToDie on Windows, ~/.local/share/7DaysToDie on Linux. Both grow, the save especially, and backing them up means copying both while the server is stopped.