Hello Kla,
Sorry to make you confusion.
what is the maximum current draw allowed of each D-RGB port of the controller?
The draw of each D-RGB port on the controller is 1A.
The controller can provide power to LED strips from SATA power supply connection.
Each port need 5V x 1A =5W, total 8 ports, so the power supply should offer total 40w to 8 pcs LED strips on the controller.