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
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  • 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
Not Available
May be in stock with partners
Where To Buy

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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
  • Time-saving file transfers, up to 70% faster than traditional USB 3.0 when used with a UASP-supported enclosure
  • Fit into standard or low profile systems, with a dual profile design

Applications

Upgrade an older PCIe-based system with USB 3.0 connectivity to fully utilize USB 3.0 devices

Expand a system's USB capabilities with two additional external USB ports

Connect additional external hard drives, CD/DVD drives, MP3 players, printers, scanners, webcams, game controllers, digital cameras, etc. to a computer system

Technical Specifications

Warranty Information
Warranty Lifetime
Hardware
Bus Type PCI Express
Card Type Standard Profile (LP bracket incl.)
Chipset ID Renesas/NEC - µPD720200
Interface USB 3.0
Ports 2
Performance
MTBF 11,914 Hours
Type and Rate USB 3.0 - 5 Gbit/s
UASP Support Yes
Connector(s)
Connector Type(s) 1 - PCI Express x1 Male
External Ports 2 - USB Type-A (9 pin) USB 3.0 Female
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.
Environmental
Humidity 0~85% RH
Operating Temperature -0°C to 50°C (32°F to 122°F)
Storage Temperature -20°C to 60°C (-4°F to 140°F)
Physical Characteristics
Product Height 19 mm [0.7 in]
Product Length 121 mm [4.8 in]
Product Weight 60 g [2.1 oz]
Product Width 76 mm [3 in]
Packaging Information
Shipping (Package) Weight 0.1 kg [0.3 lb]
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

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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.

Installation

Prior to installing this device, ensure that your operating system is up to date (for example, you have installed the most recent service pack).

To install the driver:

  1. Download the latest drivers from the StarTech.com website (http://www.startech.com/Support). You can find the part number and product ID on the product’s packaging.

Note: Windows will typically save the files to the Downloads folder that is associated with your user account (for example, C:\Users\your_name\Downloads).

  1. Once the download is complete, right-click the zip folder that you downloaded, select Extract All, and follow the on-screen instructions.
  2. In the list of extracted files, right-click the Setup.exe file and select Run as Administrator.

Note: If the Run as Administrator option is not available, you might be attempting to run the installer from within the zipped file. Extract the files using the instructions in Step 2.

  1. Follow the on-screen prompts to install the device drivers and restart the computer when prompted.
  2. Your computer will automatically complete the driver installation and your device should be ready to use.

Prior to installing this device, ensure that your operating system is up to date (for example, you have installed the most recent service pack).

To install the driver:

  1. Download the latest drivers from the StarTech.com website (http://www.startech.com/Support). You can find the part number and product ID on the product’s packaging.

Note: Windows will typically save the files to the Downloads folder that is associated with your user account (for example, C:\Documents and Settings\your_name\My Documents\Downloads).

  1. Once the download is complete, right-click the zip folder that you downloaded, select Extract All, and follow the on-screen instructions.
  2. In the list of extracted files, double-click the Setup.exe file.
  3. Follow the on-screen prompts to install the device drivers and restart the computer when prompted.
  4. Your computer will automatically complete the driver installation and your device should be ready to use.

How to

To confirm that Windows detects your expansion card, complete the following:

  1. Press the Windows key+R, type devmgmt.msc, and press Enter.
  2. In Device Manager, under the appropriate heading, confirm that your expansion card is listed and that there isn't an exclamation mark next to it.  For example, a USB controller card would be under Universal Serial Bus controllers.

Your expansion card is listed according to the name of the chipset. To determine the name of the chipset of your expansion card, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.

Troubleshooting

If the USB device does not work after your computer has been in extended hibernation, it is likely that Windows has automatically turned off the USB Root hub to save power. 

The steps below outline how to configure the USB root hub to stay on during hibernation, to prevent this from happening.
 

Windows 10 / 8

  1. On your keyboard, press the Windows key + X and select Control Panel.
  2. Click Hardware and Sound, then click Power Options.
  3. Click Change plan settings for the plan you want to change.
  4. Click Change advanced power settings.
  5. Click the plus sign (+) next to “USB settings” and “USB selective suspend setting” to expand the options and change the setting to Disabled.
  6. Click OK to apply the setting.

Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.

Windows 7 / Vista

  1. Click the Start button and select Control Panel.
  2. Click Hardware and Sound, then click Power Options.
  3. Click Change plan settings for the plan you want to change.
  4. Click Change advanced power settings.
  5. Click the plus sign (+) next to “USB settings” and “USB selective suspend setting” to expand the options and change the setting to Disabled.
  6. Click OK to apply the setting.

Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.

Windows XP

  1. On your desktop, right-click the My Computer icon and select Properties.
  2. Click the Device Manager tab.
  3. Expand Universal Serial Bus controllers by clicking the arrow to the left of it.
  4. Right-click the first USB Root Hub device and select Properties.
  5. Click the Power Management tab.
  6. Clear the box next to Allow the computer to turn off this device to save power.
  7. Click OK to apply the setting.
  8. Repeat steps 4-7 for any remaining devices in the Universal Serial Bus Controllers section with “Root Hub” in the name.

Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.

When you troubleshoot issues with a USB controller card, there are some quick tests that you can complete to rule out potential problems. You can test to make sure that the following components are working correctly and are not the source of the issue:

  • USB cables

  • USB devices

  • USB controller card

To test your setup components, try the following:

  • Use the USB cable, device, and controller card in another setup to see if the problem is with the components or the setup.

  • Use a different USB cable, device, and controller card in your setup to see if the problem persists. Ideally, you should test a component that you know works in another setup.

When you test your cables, it is recommended that you do the following:

  • Test each cable individually.

  • Use short cables when you are testing.

When you test the USB device and controller card, it is recommended that you do the following: