# System

> The operating system controls performance levels. This happens if manual control is not supported or if the system is in a thermal throttling state, at which point the operating system takes over control automatically.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine.AdaptivePerformance](/engine/6000.5/script-reference/unityengine/adaptiveperformance.md)
* **Assembly:** UnityEngine.AdaptivePerformanceModule

```csharp
System = 2
```