Product Detail PCIe 1.x card expands your desktop to support two SuperSpeed USB 3.0 Ports Market leading NEC µPD720200 chipset and USB 3.0 host software stack Fully compliant with USB 3.0 revision 1 and Intel xHCI rev 0.96 specifications This product is for standard-profile desktops. Alternatively, look for "low-profile" version Supports USB 3.0, 2.0, and 1.x devices at transfer speeds of 5000/480/12/1.5 Mbps . The "Plugable PCIe to SuperSpeed USB 3.0 2-Port Expansion Card for Standard Profile Desktops" is best product for you. We recommended Plugable PCIe to SuperSpeed USB 3.0 2-Port Expansion Card for Standard Profile Desktops