On Sat, 12 Jan 2019 04:41:14 GMT, Tim wrote:

I'm going to be adding an outboard graphics card to my PC. It has, one
each, a DVI-D, a displayport, and and HDMI port. My two monitors both have
DVI-D ports. I know I will need to get an adapter cable of some sort to
connect the second DVI-D monitor to either one of the other ports. Which
one would be best the displayport or the HDMI?
FYI, my second monitor also has a VGA port that is currently how it is
driven.

Both HDMI and DisplayPort carry sound over the wire if that makes a
difference and both can do 4k (3840x2160). However, HDMI is limited to
30FPS as far as I can tell whereas DisplayPort can manage 60FPS at
that resolution.