Lite-On 24x iHAS124 Internal DVD Writer Bundle with Nero Burning Software and Cable Accessories (SATA Optical Drive) Lite-On internal DVD drive bundle includes a Nero burning software, SATA cable, and 4 mounting screws Operating system requirements : Windows XP, Windows Vista, Windows 7, Windows 8. 1GHz or faster CPU recommended. 1GB RAM and 16GB free disck space required under 32-bit OS (2GB RAM and 20GB space under 64-bit OS) for creating a DVD disc. Maximum burn speeds of 24x for DVD-R/+R and 48x for CD-R. Maximum read speeds of 16x for DVD-R/+R and 48x for CD-R. Maximum DVD Dual Layer (DL) burn speed at 12x Smart-Burn technology automatically adjusts writing strategy and running OPC to provide the best burning quality and avoid Buffer Underrun error as well