# FiveM Server Lagging – Fix FPS Drops, OneSync & Performance

FiveM server lagging or low FPS? OneSync, bad scripts, low RAM, entity overflow & server tick – performance troubleshooting.

**Quick answer:** FiveM lag almost always comes from **too many scripts/entities**, missing **OneSync** or **low RAM**. Start with resmon (F8) and txAdmin resource monitor.

**If you landed here:** Players have low FPS, rubberbanding, delayed actions or server tick drops below 20 ms.

## 5-minute checklist

- Check **RAM/CPU** in panel – over 90%?
- **resmon** in-game (F8) – which script eats ms?
- **OneSync** enabled? → [Configure OneSync](/en/gameserver/fivem/performance-optimierung/onesync-configure)
- **Entity count** – too many vehicles/props?
- **New resources** recently? → disable one by one

## Related

- [Fix FPS drops](/en/gameserver/fivem/performance-optimierung/fixing-fps-drop)
- [Optimize FiveM](/en/gameserver/fivem/optimize)
- [Server won't start](/en/gameserver/fivem/server-startet-nicht)