StarTech.com
Discontinued

2 Port PCI Express SuperSpeed USB 3.0 Card Adapter with UASP Support

Add 2 USB 3.0 ports to your desktop computer through a PCI Express expansion slot

Product ID: PEXUSB3S2

  • Provides two external USB 3.0 connections
  • Fully compliant with USB 3.0 revision 1.0 specifications and Intel xHCI rev0.96 specifications, with transfer rates up to 5 Gbps
  • UASP support for more efficient data transfer
View More
  • Built-in optional LP4 Molex power connector for bus-powered USB devices
  • Backward compatible with USB 2.0 and USB 1.0/1.1 devices
  • Optionally provides up to 900mA per USB port
  • Compliant with PCI Express 2.0 specifications
  • Supports up to 127 USB devices per port (requires additional USB hubs)
  • Plug-and-Play and Hot-Swap compatible
  • Supports Control/Bulk/Interrupt/Isochronous USB Transfer modes
  • Includes a Low Profile installation bracket
0,00 € EUR exc VAT
0,00 € EUR inc VAT

Overview

The PEXUSB3S2 PCI Express USB 3.0 card lets you add two USB 3.0 ports to your PC through a PCI Express slot.

Featuring a native NEC PCI Express host controller chipset, the USB 3.0 standard supports transfer rates of up to 5Gbps, while still providing backward compatibility for older USB 2.0 (480Mbps) and 1.1 (12Mbps) 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 UASP supported enclosure (Note: UASP requires a compatible 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.

In addition to providing a much faster transfer rate the PEXUSB3S2 USB 3.0 card also supplies 900mA of power per USB port, allowing more and more external devices to operate without the need of an additional power source.

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

Improved Performance with UASP

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

UASP Speed Diagram

At the same peak in testing, UASP also showed up to an 80% reduction in required processor resources.

UASP Speed Diagram

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.

The StarTech.com Advantage

  • SuperSpeed USB 3.0 connectivity at up to 5 Gbps, while still backwards compatible with USB 2.0/1.x

Technical Specifications

Warranty Information
Warranty Lifetime
Hardware
Chipset ID Renesas/NEC - µPD720200
Interface USB 3.0
Performance
MTBF 11,914 Hours
UASP Support Yes
Connector(s)
Connector Type(s) 1 - PCI Express x1 Male
Internal Ports 1 - LP4 (4 pin, Molex Large Drive Power) Male
Software
OS Compatibility Windows XP(32/64-bit)/ Server 2003(32/64-bit)/ Server 2008 R2/ Vista(32/64-bit)/ 7(32/64-bit)/ 8(32/64-bit)
Special Notes / Requirements
Note The maximum throughput of this card is limited by the bus interface. If used with PCI Express Gen 1.0 enabled computers, the max throughput is 2.5 Gbps. If used with PCI Express Gen 2.0 enabled computers, the max throughput is 5 Gbps.
What's in the Box
Included in Package 1 - PCI Express USB 3.0 Card
1 - LP4 Molex to SATA Adapter
1 - Low Profile bracket
1 - Installation CD
1 - Instruction Manual

Compatibility

View full OS compatibility
Windows XP(32/64-bit)/ Server 2003(32/64-bit)/ Server 2008 R2/ Vista(32/64-bit)/ 7(32/64-bit)/ 8(32/64-bit)

Certifications

Accessories

Product Support

Frequently Asked Questions

Before You Buy

The USB expansion cards derive power from the PCI or PCI Express slot on the motherboard. When high-powered USB devices are connected to the USB expansion card, the power provided by the slot may not be enough to power all of the devices and you should connect additional sources of power. When you troubleshoot issues, you should connect an additional source of power.

Symptoms that you are experiencing power-related issues include certain devices not working correctly, not all of the devices working at the same time, and certain devices not working at all.

Examples of low-powered USB devices include USB mice, keyboards, and flash drives. An example of a high-powered USB device is an external hard drive that does not have an external source of power.