BPI-M2 Ultra has a standard HDMI 1.4 interface. so We can use HDMI-to-HDMI cable to connect BPI-M2 Ultra to the display monitor that has HDMI interface.
But If the display monitor doesn't have HDMI interface,only VGA or DVI port. We should use HDMI-to-VGA or HDMI-to-DVI cable to connect the BPI-M2 Ultra to the display monitor.
Note: if the HDMI-to-VGA/DVI cable is a bad quality cable,it will go wrong on the monitor display. please choose a good quality cable for BPI-M2 Ultra