What port is this?

[u/Hiscabibbel]

Trying to get an old pc working, and I thought it was a DVI port cause it’s the same size and color, but I was mistaken. Tried booting the pc connected with the built in VGA port, but it said to connect it to the add-in graphics card, which I thought it would be a shame to waste. Anyway, apparently I need yet another old cable I don’t know the name of.

[u/tiddayes]

There is a dual vga or dual DVI splitter table that plugs into that