I started by connecting the ethernet IC to the rockchip , after that i started brainstorming and testing around wich pcie or oculink or similar i would use for the interconnect of the devboards . I decidet to make the rockchip devboard onto an pcie card , it can work as pcie or standalone wich in the end started a hunt for an good 2 channel P mosfet , because if pcie is used it gives me 12v(step down to 5v) and 3.3v so the 5v from usb isnt needet aswell as the 5 to 3.3v so i have to switch it off when the 12v is applied but thats smth for tomorrow