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DVD drives
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DVD drives are computer input devices that play, read and write DVDs. Similar to the DVD players that connect to a TV or home theater, they come in a variety of speeds and options (for details, see DVD player).

Each X Is 1.35MB Per Second
The first DVD (1x) transferred data at 1.35MB per second, and the number of X's is that number multiplied by 1.35MB (see list below). Each DVD X is equivalent to nine X's of CD speed because DVD 1x is 1.35MB and CD-ROM 1x is only 150KB. See CD-ROM drives and DVD.

X DVD Data
Rating Transfer Rate
1x 1.35 MBytes/sec
2x 2.70 MBytes/sec
2.4x 3.17 MBytes/sec
3x 4.05 MBytes/sec
4x 5.40 MBytes/sec
5x 6.75 MBytes/sec
8x 10.80 MBytes/sec
10x 13.50 MBytes/sec
12x 16.20 MBytes/sec
16x 21.60 MBytes/sec
24x 32.40 MBytes/sec





A Whole Lotta X's
This label comes from a Memorex DVD/CD drive made in 2005. Each "DVD X" is X times 1.35MB. Each "CD X" is X times 150KB.
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