7090 and 7080 use same chassis. 7090 is basically reiteration of 7080 with updated bios for intel 11th gen cpu. this is the part list for optional video port for 7080 MFF (micro form factor) which is compatible with 7090 MFF.   [IMAGE]Optional DP (YPF8G)
I'm looking for the part number to add the third video connector (either HDMI or DP, I don't care) to my Optiplex 7090 micro. In the manual, it describes them as "Optional I/O modules (Type C/ HDMI/VGA/DP/Serial)" but my searching has not yielded a part that I can order.  This link is supposed to be to the part of the manual that talks about adding or removing the I/O Modules.  OptiPlex 7090 Tower Service Manual | Dell US And here's a screenshot of the steps to install the thing I'm talking about.  [IMAGE]
Optiplex 7090 micro third video connector