There’s a limit of 80 global dashboards per instance, global dashboards are those with access permission set to “My Organization” (check Learn about Access Restrictions and Public Sharing . The reason behind is purely technical. To avoid space problems storing the dashboards configuration, we have to limit the global dashboards creation to 80 dashboards. We will improve this in the future, changing the way we store information.
There is NO limit for private dashboards, so feel free to create as many as you need to.
Add and Manage Datasources — Learn how to add and configure datasources
Set Up a Wallboard — Set up your information radiator: A wallboard
Add and Configure Gadgets — Learn how to add and configure gadgets in dashboards
Learn about Datasources — Learn what datasources are, what types there are and why are they one of the key assets in dashboards