What is the difference between DVI-I and DVI-D? Which one is better?
If I buy a video card, which type is advisable to buy?
Very rarely I have even seen DVI-A. Where does that fit in?
You rarely see
A card should provide
DVI-I is a connector that is compatible with both DVI-A (analog) and DVI-D (digital), which are not compatible. DVI-A is largely a computer format. DVI-D is the consumer variety of DVI, the one that most people consider to be the same as HDMI without the audio (slightly inaccurately); it has found its way into the computer world between certain video cards and displays. DVI w/HDCP is DVI-D that carries the digital copy protection that is found most commonly on HDMI; at the dawn of DVI on consumer-video products, HDCP wasn't always included, sometimes making it incompatible with subsequent products that demanded it. DVI, component, and HDMI are all capable of resolutions higher than 720p.