arTech PEXUSB3S25 User Manual

2 Port PCI Express (PCIe) SuperSpeed USB 3.0
Card Adapter with UASP - LP4 Power

Product ID: PEXUSB3S25

The PEXUSB3S25 2-Port PCI Express USB 3.0 Card lets you add two USB 3.0 ports to your PCI Express-

enabled computer system, with an optional LP4 power connector to connect to your system power supply

and deliver up to 900mA of power per port to USB 3.0 bus-powered devices (500mA for USB 2.0).

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 UASP supported enclosure (Note: UASP is not

supported by all operating systems). 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 PCIe USB 3.0 adapter is compliant with USB 3.0 standards for data transfer speeds up to 5 Gbps,

while still offering backward compatibility with existing USB 2.0 / 1.1 devices. For added versatility, the

controller card is equipped with a standard profile bracket and includes a low-profile/half-height bracket

for installation in small form-factor computers.

www.startech.com

1 800 265 1844

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

Improved Performance with UASP

UASP is supported in Windows® 8, 8.1, Server 2012 and Linux kernel 2.6.37 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.

At the same peak in testing, UASP also showed up

to an 80% reduction in required processor

resources.

Test results were obtained using an Intel® Ivy

Bridge system, StarTech.com add-on USB 3.0

cards, a UASP-enabled StarTech.com enclosure,

and a SATA III solid state drive.

www.startech.com

1 800 265 1844