Note: UASP feature requires in conjunction with the in-box drivers on Windows 10/8 and MacOS. The ASMedia driver currently does not support UASP.
Windnows:
Windows 10/8.1/8: No driver installation is required
Windows 7/Vista, and Windows Server 2012/2008/2003:
ASMedia ASMUSBHost_V116451WHQL.zip (v1.16.45.1) (no UASP feature)
Mac:
It works on Mac OS X 10.9 to 10.10 and 10.12 Sierra, but does not work on OS X 10.11.

Feature Bullets
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One USB 3.1 Type-A (USB-A) and one Type-C (USB-C) downstream connectors. Up to 10Gbps data transfer speed, twice as fast as USB 3.0.
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Low Profile board. Include both Low Profile and Regular Size PCIe brackets. PCIe x4 card fits in any PCIe 2.0 or PCIe 3.0 x4 or x8 or x16 slot.
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Include power switching regulator circuit that automatically converts 12V from PCIe bus or from 15-Pin SATA power to ensure sufficient 5V/3A bus power on Type C port and 5V/2A on Type A port.
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No driver installation is required on Mac OS X 10.9 to 10.10, and 10.12 to 10.13, Win10, 8.1, 8, and Server 2012. Driver download is available for 32/64 bit Windows 7/Vista, and Windows Server 2008/2003
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Built with ASMedia ASM1142. Fully RoHS compliant. Made in Taiwan.
Product Description
Add one Type-C and one Type-A SuperSpeedPlus USB 3.1 Gen 2 ports with up to 10Gbps data rate to your system.
Specification
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USB 3.1 PCIe x4 Lane Host Adapter
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Chipset: ASMedia ASM1142
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One USB 3.1 Type-A and one Type-C downstream connectors
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Provides 5V/3A USB bus power on USB 3.1 Type C port and 5V/2A on Type A port
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Supports PCIe 1.0, 2.0, or PCIe 3.0 motherboard
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Compliant with PCI Express Specification 3.0
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Compliant with Universal Serial Bus 3.1 Specification Rev. 1.0
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Compliant with Intel eXtensible Host Controller Interface (xHCI) Specification 1.0
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Compliant with USB Attached SCSI Protocol Specification 1.0
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All USB ports can handle SuperSpeed+ (10 Gbps), SuperSpeed (5 Gbps), HighSpeed (480 Mbps), FullSpeed (12 Mbps), and LowSpeed (1.5 Mbps) transactions
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Support USB 3.1, 3.0, 2.0, and 1.1 devices
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Include power switching regulator circuit that automatically converts 12V from PCIe bus or from 15-Pin SATA power to ensure sufficient 5V/3A bus power on USB Type C port and 5V/2A on Type A port.
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Include both Low Profile and Regular Size PCIe brackets
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No driver installation is required on Mac OS X 10.9 to 10.10, and 10.12 to 10.13, Win10, 8.1, 8, and Server 2012. Driver download is available for 32/64 bit Windows 7/Vista, and Windows Server 2012/2008/2003
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CE, FCC, and Fully RoHS compliant.
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Note: The HBA adapter supports Mac OS X 10.9 to 10.10, and 10.12 to 10.13; but it does NOT work on OS X 10.11.
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Note: UASP featue is only available with Microsoft and OS X built-in drivers. Currently, the ASMedia driver does not have UASP feature.
Package Contents
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Ableconn PU31-1A1C USB 3.1 2-Port PCIe x4 Host Adapter Card
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1x low profile PCIe bracket
Warranty
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Limited One-Year Warranty and Lifetime Product Support