# Strategy for Choosing a Device

When using a "process" method on a system where multiple devices were initialized, you can expect the following behavior, depending on the mode of operation.

## Single Device per Tool

- Device List Provided

  The system will use the first GPU available in the list. If no GPU in the list is available, the method call will be blocked until a GPU from the list becomes available.

- No Device List Provided

  The system will use the first GPU available from the devices that were initialized. If no GPU is available, the method call will be blocked until a GPU becomes available.