Sony Optiarc AD-7703S. CD write speed: 24 x, CD rewrite speed: 24 x, DVD-R9 write speed: 6 x. CD read speed: 24 x. Disc loading type: Tray, Drive device, buffer size: 2 MB, Interface: Serial ATA. Media types supported: DVD-ROM, DVD-R, DVD-R DL, DVD-RW, DVD-RAM, DVD+R, DVD+RW, DVD+R9, CD-ROM, CD-R, CD-RW, Optical disk diameter: 120 mm. Burst transfer rate: 150 MB/s