If you're trying to connect a VGA monitor and a DVI computer, go for the DVI-A cable. These cables transfer DVI signals to analog displays like low-cost LCDs or CRT monitors. Many people use DVI-A cables to connect VGA devices since both technologies use the same signals. When you convert digital to analog, there's a loss of quality, so it is best to use a digital signal whenever you can in order to get the best quality transmission.