The following specification describes a custom x4 high profile PCIe add-in card that will provide 1 rear customer facing and 1 internal Thunderboltâ„¢ 4 (TBT4) branded ports. The x4 high profile PCIe add-in card will utilize the Maple Ridge controller to connect 1 rear and 1internal TBT4 ports, 2 mini display ports (to be used as inputs from graphics cards) and 1 mini display port for connection to an external monitor. The x4 high profile PCIe add-in card's internal TBT4 port will be used for possible future TBT offerings through use of a TBT bridge or hub.