4 Port PCI Express PCIe SuperSpeed USB 3.0 Controller Card Adapter with UASP - SATA Power

Add 4 external USB 3.0 ports to a low profile or standard computer, through PCI Express

Product ID: PEXUSB3S4V

  • 4 external USB 3.0 ports in a stacked layout
  • UASP support for more efficient data transfer
  • Fully compliant with USB 3.0 revision 1.0 specifications and Intel xHCI rev0.95 specifications
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  • 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
£51.99 GBP exc VAT
£62.39 GBP inc VAT
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The PEXUSB3S4V PCI Express USB 3.0 Card (with SATA Power) adds 4 external USB 3.0 ports to any PCI Express-enabled computer system with support for data rates up to 5 Gbps, while remaining backward compatible with USB 2.0 / 1.x 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.

The card uses a "stacked" port layout that places the ports one on top of the other, enabling all four USB 3.0 ports to be external facing, while still allowing the card to fit into a small form factor/low profile computer system using the included low profile bracket.

Plus, with a built-in SATA power connector, each USB port can provide up to 900mA of power to devices that draw power from a host bus connection (500mA for USB 2.0) by connecting to your computer power supply.

Backed by a 2-year 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, add-on USB 3.0 cards, a UASP-enabled enclosure, and a SATA III solid state drive.

The Advantage

  • USB 3.0 PCI-E card has 4 external USB 3.0 ports using a space-saving stacked layout
  • Time-saving file transfers, up to 70% faster than traditional USB 3.0 when used with a UASP-supported enclosure
  • Power high-powered USB devices as necessary, with the optional SATA power connector


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 four additional external USB ports, for connecting additional external hard drives, CD/DVD drives, MP3 players, printers, scanners, webcams, game controllers, digital cameras, etc.

Technical Specifications

Warranty Information
Warranty 2 Years
Bus Type PCI Express
Card Type Standard Profile (LP bracket incl.)
Chipset ID Renesas/NEC - µPD720201
Interface USB 3.0
Port Style Integrated on Card
Ports 4
Type and Rate USB 3.0 - 5 Gbit/s
UASP Support Yes
Connector Type(s) 1 - PCI Express x1 Male
External Ports 4 - USB Type-A (9 pin) USB 3.0 Female
Internal Ports 1 - SATA Power (15 pin) Plug
OS Compatibility Windows® XP, Vista, 7, 8, 8.1, 10
Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016
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
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 68 mm [2.7 in]
Product Length 75 mm [3 in]
Product Weight 68 g [2.4 oz]
Product Width 19 mm [0.7 in]
Packaging Information
Package Quantity 1
Shipping (Package) Weight 138 g [4.9 oz]
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


View full OS compatibility
Windows® XP, Vista, 7, 8, 8.1, 10
Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016


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Customer Reviews

4.2 (6 reviews)
4.2 out of 5 stars
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1 - 6 of 6 Reviews

(5 stars) Great for updating an older PC

I've been running this card well over a year and beside having to reinstall the drivers once (power failure) this card has been flawless. My machine only has USB 2.0 ports so the speed upgrade was quite dramatic, I don't think you quite get the full 5gbps as advertised but my external USB drives do outperform my internal SATA II hard drives.
Comment Helpful? Yes - 0 No - 0 Report

(5 stars) Best for VR!

This card works brilliantly for my Oculus Rift (VR). It supports windows 10, but make sure you don't install the old drivers from this website. The new ones are automatically installed by windows 10, and are (at the time of my writing) driverversion 10.0.16299.125, dated 07.12.2017. Make sure your motherboard has enough PCIe-lane bandwidth left for a for x4 card - as well as a x4 slot, of course. Some motherboards downgrade to x1-speed when other slots are taken. Doublecheck your motherboard manual! Also keep in mind to plug in power from your PSU, otherwise the card won't work as well.
Comment Helpful? Yes - 0 No - 0 Report

(1 star) Only runs high-speed (usb2) not super-speed (usb3)

Test the card on server 2016, will not accept the drivers from OS or the cd, make a firmware upgrade, the OS can now find a driver, only run USB 2.0. Try to install the drivers from cd, the system accepted the drivers, but only run usb 2.0 Have try a usb 3 pen and a usb 3 harddrive.
Comment Helpful? Yes - 0 No - 1 Report

(5 stars) Half Height - PCI Express Card Adapter

I have been using the USB 3.0 PCIe card adapter for about 6 months and it installed easily and has worked flawlessly. The half height card bracket came with the kit and enabled me to use it in my ASUSPro Series system unit.
Quality of Product (5/5)
Comment Helpful? Yes - 0 No - 0 Report

(4 stars) great but only works sometimes

I got it a year ago and it didn't work with my hp but I blame the mobo in that. It works on my main rig so it's still functional as extra USB ports.
Quality of Product (4/5)
Comment Helpful? Yes - 0 No - 0 Report

(5 stars) Works perfectly with ProFlightSim instr. panels

The price was right, and it is small enough to fit in with my rather large GTX 780Ti graphics card. The Pro Flight Sim instrument panels require USB 3.0 ports; all eight work perfectly with two 4 port StarTech PCIe cards.
Quality of Product (5/5)
Comment Helpful? Yes - 0 No - 0 Report