[geeks] Not-quite DVI video?

[Mouse]

I've got an HP machine which has a video card marked with the HP logo
and "A4977A Vis EG-PCI".  I'd like to use it - but the video connector
is odd.  It loooks like DVI at first blush, but it's not; the shell is
longer than a DVI connector.  It looks as though someone took a DVI
connector and enlarged the 3x8 grid of pins to 3x10.

Anyone know what this is, and, in particular, what it would take to
connect it to a non-HP-specific monitor (DVI, VGA, even HDMI or DP if
need be)?

I tried replacing the card with a PCI video card from my stock of video
cards, but I don't get any video out of it, leading me to suspect the
ROM code is refusing to work with third-party video.

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