The DBW-521 is a half-height internal CD-R/RW & DVD-ROM drive, with IDE/ATAPI interface. The drive is able to write CD-R/RW discs and can also perform as a regular DVD-ROM drive. The DBW-521 offers 16X speed DVD-ROM disc reading, 52X speed CD-R disc writing, 24X speed CD-RW disc writing and 52X speed CD-ROM disc reading capabilities. Read the article here