The converter is finally working. Required to connect my work laptop to my new ultra wide monitor via HDMI at 3440 x 1440 resolution. The laptop didn't have an HDMI output so had to switch Displayport or DVI-D to HDMI. I tried several cables including one that supported 4K but all I could get was 1920 x 1080. It worked, worked for my monitor but only at 50Hz which is fine for my needs.