I’m going through old cables and get the impression that this is for a specific product, but I can’t tell what product it’s for.
I’m going through old cables and get the impression that this is for a specific product, but I can’t tell what product it’s for.
That pinout matches this port:
https://www.techpowerup.com/articles/other/97
So this is probably intended as a video out cable, rather than video in. The extra pins may go into unused holes in the port, or pass into the rectangular hollow in it where the keying peg would usually go. If not for an ATI card or port like this, it’s certainly for something similar. Notably, neither your cable nor this port carry a component video signal which was typical for later nVidia cards and their ilk.
Likely Solved
Of the options people have presented, a video card is by far the most likely for us to have owned at the era those options are from. The two-way arrow symbol on the connectors does give a little bit of doubt, but it seems pretty clear at this point that if I still owned the matching product, I wouldn’t use it, and that’s enough info for my needs