Quick answer: Valheim lag: check/disable mods, RAM to 8 GB+, reduce builds and restart server regularly.
If you landed here: Rubberbanding, delayed actions, long load times entering bases or TPS drops with many players.
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Frequently asked questions (FAQ)
Valheim server lagging – most common cause?
BepInEx/mod conflicts, huge world with thousands of builds, low RAM (4 GB often not enough for 10+ players with mods).
Mods cause lag?
Disable mods one by one. PlantEverything, BuildShare and large world-edit mods are common causes. Server and client mod versions must match.
Valheim lags without mods?
Check world size and builds. Crossplay can add load. RAM to 8 GB+, restart every 24–48 h.