Dell released an article about the Thunderbolt 3 design in Dell systems. If you are experiencing issues including reduced data transfer rates instead of the maximum 40gbps or a single external display instead of dual video display, the reason might be the Thunderbolt 3 port on your computer is...

Thunderbolt 3 uses the same reversible USB-C connector and by default supports data, video, and power. Not all computers with USB-C ports are Thunderbolt 3 enabled. Here is the list by manufacturer of computers that support Thunderbolt 3: Dell Dell XPS 12 9250, 13 9350 / 9360 / 9365 / 9370,...