Startech 2 Port PCI Express (PCIe) SuperSpeed USB 3.0 Card Adapter with UASP - LP4 Power - Dual Port USB 3 PCIe Controller (PEXUSB3S25) - USB adapter - PCI Express x1 - USB 3.0 x 2 - for P/N: CFASTRWU3, S251SMU33EP, ST103008U2C, ST53004U1C, ST7300U3M, ST9

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 (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, 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.

• Two external USB 3.0 ports for enhanced connectivity
• High-speed data transfer rate of 5 Gbps
• Compliant with FCC and RoHS standards
• Low-profile design suitable for various systems
• Wide operating temperature range of 0°C to 50°C

• Enhanced connectivity options
  Equipped with two 9-pin USB Type-A ports, this adapter allows for multiple devices to be connected simultaneously, enhancing system capabilities.
• High-speed performance
  USB 3.0 technology ensures data transfer rates of up to 5 Gbps, enabling quick file transfers and device connections.
• Reliable compatibility
  Supports a range of USB standards, including USB 1.1, USB 2.0, and USB 3.0, ensuring broad device compatibility.
• Robust environmental design
  Operates reliably in temperatures ranging from 0°C to 50°C, making it versatile for various usage scenarios.
• Trusted quality standards
  Meets FCC and RoHS compliance, ensuring a product that adheres to safety and environmental standards.

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).