With incredibly fast reading speeds backed with stability BenQ's CD-ROM drives are just what you need to be able to play music, video games or to run applications.The CD-656A is a 56X maximum speed, 5.25" internal CD-ROM drive. It employs the advanced CAV (Constant Angular Velocity) technology that maintains consistent CD-ROM disk rotation speed and reads data at various transfer rates. This feature ensures less stressing of the spindle motor and thus better reliability of the drive. Flash Memory provides an easy solution for you to upgrade the software in your BenQ drive.