Add 2 SuperSpeed USB 3.
0 ports to your PCI Express-enabled PC.
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.
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.
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.
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.