... High Speed, Full Speed, and Low Speed External USB3.0 Port x 2 Pulg into PCIe Slot Introduce USB3.0 2 ... Specification 0.96Two downstream ports Support Super Speed, High Speed, Full Speed, and Low Speed.Compliant ... Express Specification 2.0Initial Driver support for Windows 7, Vista and XP High quality external 2 ports ... USB3.0 PCI-e Card, 2 ports usb pci-express ...