diferrence between 20X, 16X, 12X, ect.

[mortonman1]

i see these numbers and x's or multiplication symbols but what do the mean? whats the difference?

 

[StrangleHold]

Talking about speed or transfer rates? 1X for CD-Roms is 500RPM or 150 kilobytes per second. You just double as the speed increases. DVD is faster 1X is 1.32 MB/sec

 

[mortonman1]

i see those types of numbers everywhere so im just wondering