Cannot get DVI to work with my GTX 1050 Ti.

It will recognize HDMi just fine.

NVIDIA web drivers and High Sierra are up to date.

With an HDMI monitor plugged in, the screen will work fine on HDMI and the DVI monitor stays black/power-save mode. With JUST the DVI monitor plugged in, it will work up until the NVIDIA Web Drivers kick in, at which point it simply goes back into power saving mode.

Using a GTX 1050 Ti. Core i5-2400, 12GB DDR3. SMBIOS is 27" iMac, late-2013.