Max Resolution on Dell 3100
 

I have a dual boot system and the Dell 3100 will support 3840x2160 out of the display port with an HDMI adapter (and HDMI 2.0 cable) using Windows 10. I've not gotten the same resolution from Linux (Ubuntu 16.04.1 LTS) using the displaylink-driver-1.2.65. I'm limited to 1920x1080.