Genuine Dell Ultra Slim IDE DVD-ROM Optical Drive with Tray and IDE Cable Compatible Systems: Optiplex : GX520, GX620 Dimension : 5100C, 5150C 9.5mm height internal slim DVD-ROM Drive, Read Speed: CD-R (24X CAV), CD-RW (24X CAV), CD-ROM (24x CAV), DVD-ROM (8X CAV) DVD-R (3.95 GB, 4.7 GB), DVD-RW (4.7 GB) disc read compatible, DVD+R, DVD+RW read compatible Easy-to-use drawer loading mechanism, Enhanced-IDE (ATAPI) model Enhanced-IDE (ATAPI) model, Improved Buffer Under Run Error handling through the Preventive function Compatible Systems : Small Form Factor (SFF): Optiplex : GX520, GX620, Dimension : 5100C, 5150C