Like the subject says..
http://www.btc.com.tw/english/2-2-dvd_rw.htm#drw1016im
Writing Speeds:
DVD+R: 16x Max
DVD+RW: 8x Max
DVD+R DL: 4x Max
DVD-R: 16x Max
DVD-RW: 4x Max
CD-R: 48x Max
CD-RW: 24x Max
Read Speeds:
DVD-ROM: 16x Max
DVD±R: 8x Max
DVD±RW: 8x Max
CD-R/ROM: 48x Max
CD-RW: 32x Max
Access Times:
CD-ROM: 130ms
DVD-ROM: 160ms
Buffer Size: 2MB