I'm not sure either. Checking my Dell LCD docs it says "Your graphics card must use a DVI-D connection..." I've checked quite a few graphic card manufacturers and a majority of them are DVI-I but Hercules made their line of GeForce cards with DVI-D connections. Checking a few online cable stores show that there are separate DVI-I cables and DVI-D cables, according to their explaination DVI-I standard is a subset of DVI-D standard. Confused? I am, I just want to find a new GeForce4 with a DVI-D. Maybe you're right though, maybe a DVI-I would work but it wouldn't be as clear or I couldn't use a high resolution? I'm not sure about the compatibility.