StarTech.com 4 Port PCI Express PCIe SuperSpeed USB 3.0 Controller Card Adapter with UASP - SATA Power PEXUSB3S4V User Manual

The PEXUSB3S4V PCI Express USB 3.0 Card (with SATA Power) adds 4 external USB 3.0 ports to any PCI
Express-enabled computer system with support for data rates up to 5 Gbps, while remaining backward
compatible with USB 2.0 / 1.x devices.

Enhanced with UASP support (USB Attached SCSI Protocol), this USB 3.0 controller performs up to 70% faster
than conventional USB 3.0 when paired with a 

operating system). Using a more efficient protocol than the traditional USB BOT (Bulk-Only Transport), UASP
technology optimizes transfers by allowing multiple commands to be processed simultaneously, significantly
increasing transfer speeds for less wait time on data transfers. See our UASP test results below for further
details.

The card uses a "stacked" port layout that places the ports one on top of the other, enabling all four USB 3.0
ports to be external facing, while still allowing the card to fit into a small form factor/low profile computer system
using the included low profile bracket.

Plus, with a built-in SATA power connector, each USB port can provide up to 900mA of power to devices that
draw power from a host bus connection (500mA for USB 2.0) by connecting to your computer power supply.

Backed by a StarTech.com 2-year warranty and free lifetime technical support.

UASP is supported in Windows® 8, Server 2012 and Linux kernel 2.6.3 or later. In testing UASP performed with
up to a 70% faster read / 40% faster write speed over traditional USB 3.0 at peak performance.

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