Q: I have a white cable (digital) connected from my LCD 20 inch monitor to my Nvidia8800GTX. Is Analog better than digital? What's the difference? Analog is blue and digital is white right?
A: For analog: The digital signal is converted to analog, put up a signal cable, often of dubious quality, and then is sampled by the monitor (there is no sync signal to tell it when to sample) and converted back to a digital signal. You get jitter from poor sampling and changes in black/white levels from the A to D and D to A processes being different. Noise from signal interference. Ringing from signal cable quality issues and ghosting from reflections of the signal. For digital: The digital signal is sent from the system to the monitor. The only down side to digital is that if there is a lot of noise you get no image, rather than analog providing a really bad image. Only very rarely an issue. While the monitor manufacturers have worked hard to resolve the issues with analog, digital is superior. And yes, blue connectors are VGA analog. White connectors are DVI, which can be analog, digital, or both. Typically they are digital for cables.