Dell OptiPlex 300 700 GX Series Rear I/O Panel Serial PS/2 Low Profile Add-In Card Y9001 0Y9001 CN-0Y9001.Dell Part Number: Y9001 0Y9001 CN-0Y9001 Compatible Models: Dell OptiPlex 320 330 360 740 740e 745 745e 755 GX520 GX620