Cheaper TFT's have analouge interfaces, but the screens are digital, this means your PC is converting a digital signal to analouge, then the monitor is changing the analouge to digital again at the other end, it is rather pointless and degrades the quality.
DVI is the new interface for digital displays, it carrys a digital signal right to the monitor and removes the pontless conversion. The DVI port also transmits normal VGA within it though, which is why you can still use a VGA monitor on a DVI port with a cheap adapter.
DVI is the new interface for digital displays, it carrys a digital signal right to the monitor and removes the pontless conversion. The DVI port also transmits normal VGA within it though, which is why you can still use a VGA monitor on a DVI port with a cheap adapter.