The sale point of supporting 3 monitors has a caveat.  Instead of thunderbolt it's usb3.1 I tried for a week using two different thunderbolt to hdmi adapters without luck.  Intel's support was less than stellar when it came to this topic.  Once I got the following item triple monitor worked like a champ for this unit:https://www.amazon.com/gp/product/B06Y2FX13G/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1