Duel 2 Port USB 3.0 UPGRADE Super Speed PCI-E x1 High Profile, Full Height Expansion Controller Card, Useful With All 64-bit Operating Systems, Compatible Dell Part Number: 2HH3F Interface (Bus) Type: PCI Express x1, Data Link Protocol: SuperSpeed USB 3.0 Ports: 2 x USB 3.0, Form Factor: Plug-in Card Device Type: Storage Controller Plug-in Card Full Height/High Profile, Compatible with ANY 64-bit Operating System Compatible Dell Part Numbers: 2HH3F