STARTECH.COM ST PEXUSB3S4V - 4Port USB 3.0 PCI Express card with UASP

Add 4 external USB 3.0 ports to a low profile or standard computer via PCI Express

• 4 external USB 3.0 ports in stack layout
• UASP support for more efficient data transfer
• Fully compliant with USB 3.0 revision 1.0 and Intel xHCI rev 0.95 specifications
• Integrated optional SATA power connector for bus-powered USB devices
• Provides up to 900 mA per USB port

The PCI Express USB 3.0 card (with SATA power supply) PEXUSB3S4V provides a PCI Express-enabled computer system with 4 external USB 3.0 ports supporting data rates of up to 5 Gbit/s and backward compatibility with USB 2.0/1.x devices.

With support for USB attached SCSI Protocol (UASP), this USB 3.0 controller in combination with a UASP-enabled chassis is up to 70% faster than a conventional USB 3.0 (Note: UASP requires a compatible operating system). Using a more efficient protocol than the conventional USB (Bulk-only Transport) OFFERED, UASP technology optimizes transmissions by processing multiple commands simultaneously, significantly increasing transmission speed and reducing data transfer wait times. For more information, see our UASP test results below.

With this card, the ports are arranged on top of each other so that all four USB 3.0 ports are accessible from the outside, while the card still fits into a compact computer system or a low profile computer system using the included low profile slot plate.

Thanks to the integrated SATA power connection, each USB port also supplies the devices, which can be powered via a host bus connection, with up to 900 mA (500 mA for USB 2.0 devices). To do this, simply connect the computer to the power supply.

Improved performance with UASP
UASP is supported on Windows® 8 and Server 2012. Compared to conventional USB 3.0, UASP performed at maximum system utilization with up to 70% faster read speed and up to 40% faster write speed in tests. ...