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Go to StarTech.com4-Port PCI Express USB 3.0 Card (PEXUSB3S42)
4 Port SuperSpeed USB 3.0 PCI Express Card with UASP - SATA Power
Add 4 USB 3.0 ports to your desktop computer through a PCI Express expansion slot
Product ID: PEXUSB3S4
- Adds four USB 3.0 ports in total; 3x External, 1x Internal
- Fully compliant with USB 3.0 revision 1.0 specifications and Intel xHCI rev0.95 specifications, with transfer rates up to 5 Gbps
- UASP support for more efficient data transfer
- Built-in optional SATA power connector for bus-powered USB devices
- Optionally provides up to 900mA per USB port
- Backward compatible with USB 2.0 and USB 1.0/1.1 devices
- Compliant with PCI Express 2.0 specifications
- Includes a Low Profile/half-height installation bracket
Overview
The PEXUSB3S4 4-Port PCI Express SuperSpeed USB 3.0 Card (with SATA Power) adds 3 external USB 3.0 ports and an internal USB 3.0 port to any PCI Express-enabled computer system. With SuperSpeed USB 3.0, you can reach data transfer speeds up to 5 Gbps, while still being backward compatible with existing USB 2.0 devices at 480Mbps.
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.
With a built-in SATA power connector, each USB port can provide up to 900mA of power to USB 3.0 devices (500mA for USB 2.0) by connecting to your computer power supply. 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.
Backed by a StarTech.com 2-year warranty and free lifetime technical support.
Improved Performance with UASP
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.
The StarTech.com Advantage
- SuperSpeed USB 3.0 connectivity at up to 5 Gbps and 80% more power than USB 2.0
- Fit into standard or low profile systems, with a dual profile design
- Ensure sufficient power for your USB devices with the integrated SATA power connector
Applications
Upgrade an older PCIe-based system with USB 3.0 connectivity, to fully utilize USB 3.0 devices
Ideal for newer computer systems with only SATA power connectors, or a limited number of older LP4 power connectors
Expand a system's USB capabilities with three 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 through USB 3.0
Technical Specifications
Warranty Information | ||
---|---|---|
Warranty | 2 Years | |
Hardware | ||
Bus Type | PCI Express | |
Card Type | Standard Profile (LP bracket incl.) | |
Chipset ID | Texas Instruments - TUSB7340 | |
Interface | USB 3.0 | |
Ports | 4 | |
Performance | ||
Maximum Data Transfer Rate | 5 Gbps | |
UASP Support | Yes | |
Connector(s) | ||
Connector Type(s) | 1 - PCI Express x1 Male | |
External Ports | 3 - USB Type-A (9 pin) USB 3.0 Female | |
Internal Ports | 1 - SATA Power (15 pin) Plug | |
1 - USB Type-A (9 pin) USB 3.0 Female | ||
Software | ||
OS Compatibility | Windows® 8 / 8.1 (32/64bit), 7 (32/64), Vista (32/64), XP (32/64) Windows Server® 2012, 2008 R2, 2003 Linux 3.5 |
|
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. | |
System and Cable Requirements | Available PCI Express expansion slot | |
Environmental | ||
Humidity | 20% ~ 80% RH | |
Operating Temperature | 5°C to 50°C (41°F to 122°F) | |
Storage Temperature | -25°C to 70°C (-13°F to 158°F) | |
Physical Characteristics | ||
Product Height | 0.9 in [22 mm] | |
Product Length | 3.5 in [90 mm] | |
Product Weight | 2.1 oz [60 g] | |
Product Width | 2.8 in [70 mm] | |
Packaging Information | ||
Shipping (Package) Weight | 6.7 oz [190 g] | |
What's in the Box | ||
Included in Package | 1 - PCI Express USB 3.0 card | |
1 - Low Profile Bracket | ||
1 - Driver CD | ||
1 - Instruction Manual |
Compatibility




Windows Server® 2012, 2008 R2, 2003
Linux 3.5
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Product Support
Drivers & Downloads
Driver(s):
-
[TI_TUSB7340] USB 3.0 Controller.zip
Windows Version: 1.12.18.0
Manual(s):
-
PEXUSB3Sxx.pdf
English
Compliance Letter(s):
Data Sheet(s)
- PEXUSB3S4_Datasheet.pdf
English
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.
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How to
To confirm that Windows detects your expansion card, complete the following:
- Press the Windows key+R, type devmgmt.msc, and press Enter.
- 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.
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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
- On your keyboard, press the Windows key + X and select Control Panel.
- Click Hardware and Sound, then click Power Options.
- Click Change plan settings for the plan you want to change.
- Click Change advanced power settings.
- Click the plus sign (+) next to “USB settings” and “USB selective suspend setting” to expand the options and change the setting to Disabled.
- 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
- Click the Start button and select Control Panel.
- Click Hardware and Sound, then click Power Options.
- Click Change plan settings for the plan you want to change.
- Click Change advanced power settings.
- Click the plus sign (+) next to “USB settings” and “USB selective suspend setting” to expand the options and change the setting to Disabled.
- 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
- On your desktop, right-click the My Computer icon and select Properties.
- Click the Device Manager tab.
- Expand Universal Serial Bus controllers by clicking the arrow to the left of it.
- Right-click the first USB Root Hub device and select Properties.
- Click the Power Management tab.
- Clear the box next to Allow the computer to turn off this device to save power.
- Click OK to apply the setting.
- 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.
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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:
-
Press the Windows key + R, type devmgmt.msc, and press Enter to open Device Manager. Check to see if your device is listed under Universal Serial Bus controllers.
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If you do not see the USB controller card listed in Device Manager please see this FAQ: https://www.startech.com/support/faqs/technical-support?topic=expansion-cards#pci-pcie-cannot-boot-os-or-detect-windows.
-
If the device is listed with an error, follow the instructions on the website to reinstall the drivers.
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* Product appearance and specifications are subject to change without notice.
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4 Port SuperSpeed USB 3.0 PCI Express Card with UASP - SATA Power
Product ID: PEXUSB3S4
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