Apart from the standard issue Radeon RX 580 GPU, the latest Gaming Box from Gigabyte comes with the usual 450 W PSU, and connectors including the Thunderbolt 3 port plus four more USB ports that let users connect peripherals like external HDDs. Additionally, there is support for three Display Port 1.3 outputs and an HDMI 2.0 port.
https://www.notebookcheck.net/Gigabyte-adds-Radeon-RX-580-cards-to-its-external-Gaming-Box-lineup.290276.0.html