Most optical drives today are combo CD/DVD drives that support DVDs and all the CD formats: CD audio, CD-ROM, CD-R and CD-RW. The speeds of the drives are rated by their CD-ROM and DVD transfer rates.

CD-DA Super Audio CD CD-R discs CD-RW discs CPRM (DVD-R/RW/RAM) Write read speeds: DVD-RW 6X maximum by ZCLV, DVD+RW 8X maximum by ZCLV, CD-RW 24 X maximum by ZCLV, Read DVD-R/RW/ROM 8 X maximum ...