The DVI-I connector is the best of both worlds; digital and analog. But it is also the least common connector, most likely because it is more costly to produce and purchase.
The DVI-I connection is able to go digital-to-digital (like DVI-D) or analog-to-analog (like DVI-A). It has the same appearance as a DVI-A connector, making it difficult to know if it is DVI-A or DVI-I. Basically, if you are lucky enough to have a DVI-I connector on your computer – be happy!
Troy @ TLC