QualitySettings.vSyncCount

Description

The VSync Count.

The number of VSyncs that should pass between each frame. Use 'Don't Sync' (0) to not wait for VSync. Value must be 0, 1, 2, 3, or 4.

If this setting is set to a value other than 'Don't Sync' (0), the value of Application.targetFrameRate will be ignored.

Note: This does not apply on iOS, where the VSync setting is ignored. On iOS, the device displays frames on a VBlank. If a VBlank is missed because of the set Application.targetFrameRate or low performance, the frame is displayed on the next one.

using UnityEngine;

public class Example : MonoBehaviour
{
    void Start()
    {
        // Sync framerate to monitors refresh rate
        QualitySettings.vSyncCount = 1;
    }
}

See Also: Quality Settings.