Sunshine-tipway&reg; 2 Port USB 3.0 to Pci-e PCI Express Card Adapter Converter Motherboard 20 Pin Connector Built-in with 4-pin Power Extend with 2 USB 3.0 downstream ports and 1 USB3.0 19-pin Connector(can expand another two USB 3.0 ports) for standard desktop PC. Super Speed USB 3.0 offers 10 times performance increase over Hi-Speed USB 2.0. Fully compliant with one-lane (x1) PCI Express 2.0 specification. TWO external 5Gbps SuperSpeed USB 3.0 ports. One 19-pin internal 5Gbps SuperSpeed USB 3.0 port.