StarTech.com 4-Port PCI Express USB 3.0 Card with 4-Dedicated 5Gbps Channels - UASP - SATA/LP4

StarTech.com PEXUSB3S44V

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Manufacturer Part#  PEXUSB3S44V

UPC Code: 065030854627

Provantage Code:  STR939K

Condition:  Factory New

  • Product Type: USB Adapter
  • Limited Warranty: 2 Year
  • Host Interface: PCI Express x4
  • Form Factor: Plug-in Card
  • Length: 6.6"
  • TAA Compliant: No

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StarTech.com PEXUSB3S44V Specifications

    4-Port PCI Express USB 3.0 Card with 4-Dedicated 5Gbps Channels - UASP - SATA/LP4

At a Glance

    Rear View
    • Provides four external, independent USB 3.0 Ports
    • Supports up to 20 Gbps total transfer bandwidth - Up to 5 Gbps per port
    • UASP support across all four ports
    • PCIe x4 interface compliant with PCI Express 2.0 specifications
    • Optional LP4 or SATA power connector provides up to 900mA per USB port
    • Supports USB Battery Charging Specification 1.2 (Apple Mode only)


    Top View

    The PEXUSB3S44V 4-Port PCI Express USB 3.0 Card lets you add four, dedicated 5 Gbps USB 3.0 ports to your PCIe x4-enabled PC. This independent port architecture improves USB 3.0 performance by transferring data on four individual channels to your computer, giving you faster file transfers.

    When multiple devices are connected, traditional single bus USB 3.0 cards share your maximum bandwidth between all ports. By employing four host controller chipsets, each port operates on a separate independent transmission channel. Dedicating up to 5 Gbps to each USB port reduces performance bottlenecks, and effectively quadruples your total available to bandwidth to 20 Gbps.

    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.

    For high-power USB devices, this PCIe USB 3.0 card includes an optional SATA or 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). The USB 3.0 card also supports USB Battery Charging Specification 1.2 (Apple Mode only), letting you charge compatible Apple devices (iPhones and iPads) faster than a standard USB 3.0 port.

    The controller card is compliant with USB 3.0 standards while offering backward compatibility with existing USB 2.0 / 1.1 devices. For added versatility, the USB 3.0 PCIe 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, 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.

    More from the Manufacturer

Environmental Certification

    Left View





    Front View

    OS Compatibility:

    • Windows® Vista, 7, 8, 8.1, 10
    • Windows Server® 2008 R2, 2012, 2012 R2, 2016, 2019
    • Linux 2.6.31 to 4.11.x LTS versions only

Package Contents

    • 4 Port PCIe USB Card
    • 1 x Low Profile Bracket
    • 1 x Driver CD
    • 1 x Instruction Manual


General Information
Product Name4-Port PCI Express USB 3.0 Card with 4-Dedicated 5Gbps Channels - UASP - SATA/LP4
Manufacturer Part NumberPEXUSB3S44V
Packaged Quantity1
Product TypeUSB Adapter
Technical Information
Host InterfacePCI Express x4
Total Number of USB Ports4
Number of USB 3.0 Ports4
Media & Performance
UASP SupportYes
Physical Characteristics
Form FactorPlug-in Card
Limited Warranty2 Year
Platform SupportedPC


Environmentally FriendlyYes
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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