5.1.1  Iray Resource Manager for local rendering

Resource Manager to set up the local render resourves
When choosing the Local tab the Iray Resource Manager shows a list of all detected CPUs and NVIDIA graphic cards that are found by Iray and will be used for rendering. By default all devices are enabled.
If a specific render resource has no check mark it won't be used by Iray. This makes sense, for example, if you want to save performance for the user interface.
Note: You must enable at least one render resource to work with Iray.