that's weird ?? never known NVidia to use dvi-d only on there cards ??? primarily NVidia cards have dvi-I first and foremost and maybe dvi-d as secondary ??
what card /brand is it ? I'd like to look at that ??
never mind I see now what going on -- some brands use a vga for the analog and dvi-d for the digital outputs .. interesting .. [thanks learned something on that ]
heres the deal how I see it
yes the adaptor should work cause the dvi-I supports analog and digital [why theres the 4 extra holes around the flat pin thing] dvi-d is digital only [4 extra holes missing for the analog support ]
so you can go from dvi-d to dvi-I
https://en.wikipedia.org/wiki/Digital_Visual_Interface
so yes I fell it should work fine
added info
''The two kinds of connectors are DVI-D and DVI-I. It's easy to tell them apart. DVI-I has a pair of slots which look like a plus sign with four sockets around it. DVI-D has a single slot which looks like a minus sign. Because of that physical difference, you can plug a DVI-D cable into a DVI-I connector but you can't plug a DVI-I cable into a DVI-D connector. A DVI-D cable is wired only for the digital video signal. DVI-D cables can't carry analog signals.
http://www.playtool.com/pages/dvicompat/dvi.html