DVI-D Source to DVI-I Monitor?

So I'm considering seeing if I can get a GTX Titan or two. I run 3 Dell UH2311H's, which have Displayport and DVI inputs. However, the Titan has a DVI-I as well as a DVI-D output. Would the DVI-I still fit into the DVI-D output? Or should I just get a DVI-D to DVI-I cable?

Just use a DVI-D cable. DVI-D cable will fit into DVI-I socket, but DVI-I (or DVI-A) will not fit into DVI-D socket.

Oh ok nice thanks