Valheim: Dedicated Server Requirements
Running a smooth Valheim server depends on balanced hardware. While the game isn't heavily CPU-intensive, it is sensitive to network latency and single-core performance. This guide outlines the necessary specs for a lag-free experience.
Hardware Specifications
| Component | Recommended Requirement |
|---|---|
| CPU | 4 Cores (High clock speed preferred over core count) |
| Memory (RAM) | 4GB for 2-10 players. 8GB+ for heavily modded servers. |
| Storage | 10GB Free SSD space (plus additional for world backups). |
| Bandwidth | 100 Mbps Up/Down minimum. |
Optimizing Server Performance
1. Combatting Desync
Valheim uses a unique networking model where one player acts as the "owner" of an area. If that player has a poor connection, everyone nearby will experience lag.
Solution: Install the Better Networking mod. It increases the data rate limit from the default 64kb/s to a much more modern 256kb/s+.
2. Memory & Item Cleanup
Over time, dropped items (drops) can accumulate and slow down world-save times.
- Use the admin command
removedropsregularly. - Be warned: this deletes ALL items on the ground globally. Ensure players are not in the middle of a move!
3. Server Location
Latency (Ping) is the #1 enemy of Valheim combat. Always host your server in a region closest to the majority of your players. Routing issues across oceans will cause "ghost hits" where enemies strike you before their animation finishes.
Pro Tip: Valheim servers use ports 2456-2458 (UDP) by default. Ensure these are open in your firewall or NAT settings.
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