CC773 CC755 Y8533 Dell CD-RW/DVD ROM Combo Optical Drive CRX835E-DC Read DVD: 8x Read CD: 24x Write CD-R: 24x Write CD-RW: 24x For Optiplex GX520, GX620 Dimension 5150C / XPS 200 Small Form Factor (SFF) Systems Read DVD: 8x; Read CD: 24x Write CD-R: 24x; Write CD-RW: 24x Dell P/N: CC773 and compatibles Model Number: CRX835E-DC and compatibles