Sony AD-7280S-0B 24x SATA Internal DVD+/-RW Drive (Black) Drive Type: Internal DVD+/-RW Dual Layer Drive Interface: SATA Buffer Memory: 1 MB Random Access Time: DVD - 160ms; CD - 140ms O/S Compatibility: Windows 7 compatible Drive Type: Internal DVD+/-RW Dual Layer Drive Interface: SATA Buffer Memory: 1 MB Random Access Time: DVD - 160ms; CD - 140ms Write: DVD+R/-R: 24X; DVD+RW/-RW: 8X/6X; DVD+R/-R DL: 12X; DVD-RAM: 12X