4 Port PCI Express (PCIe) SuperSpeed USB 3.0
Card Adapter w/ 4 Dedicated 5Gbps Channels UASP - SATA / LP4 Power
Product ID: PEXUSB3S44V
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.
0800 169 0408
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
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
At the same peak in testing, UASP also showed up
to an 80% reduction in required processor
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.
0800 169 0408
0800 169 0408
Certifications, Reports
and Compatibility
Upgrade an older PCIe-based system to USB 3.0 connectivity and
UASP support to fully utilize USB 3.0 devices
Expand the USB capabilities of your system with four external ports
for connecting additional external hard drives, CD/DVD drives, MP3
players, printers, scanners, webcams, game controllers, digital
cameras, etc. to a computer system
Provides four external, independent USB 3.0 Ports
Supports up to 20 Gbps total transfer bandwidth - Up to 5 Gbps per
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)
Fully compliant with USB 3.0 rev 1.0 and Intel xHCI rev 1.0
Backward compatible with USB 2.0 and USB 1.0/1.1 devices
Includes a Low Profile/half-height installation bracket
Hot-swap feature to connect/disconnect devices without powering
down the system
0800 169 0408
2 Years
Bus Type
PCI Express
Card Type
Standard Profile (LP bracket incl.)
Chipset ID
Renesas/NEC - µPD720202
Industry Standards
USB 3.0 Specification Rev. 1.0
USB Battery Charging Specification Rev. 1.2 (Apple Mode
PCI Express Base Specification Rev. 2.0
Intel xHCI Specification Rev. 1.0
USB 3.0
Port Style
Integrated on Card
Maximum Cable Length
3 m [9.8 ft]
Maximum Data Transfer Rate
5Gbps per port - 20Gbps Total
Type and Rate
USB 3.0 - 5 Gbit/s
UASP Support
Connector Type(s)
1 - PCI Express x4 Male
External Ports
4 - USB Type-A (9 pin) USB 3.0 Female
Internal Ports
1 - LP4 (4 pin, Molex Large Drive Power) Male
1 - SATA Power (15 pin) Plug
OS Compatibility
Windows® Vista, 7, 8, 8.1, 10
Windows Server® 2008 R2, 2012, 2012 R2, 2016
Linux 2.6.31 to 4.11.x LTS versions only
Special Notes /
System and Cable Requirements
Available PCI Express x4 or greater slot
5~85% 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)
Product Height
120 mm [4.7 in]
Product Length
167 mm [6.6 in]
Product Weight
90 g [3.2 oz]
Product Width
15 mm [0.6 in]
Shipping (Package) Weight
204 g [7.2 oz]
0800 169 0408
What's in the Box
Included in Package
1 - 4 Port PCIe USB Card
1 - Low Profile Bracket
1 - Driver CD
1 - Instruction Manual
Product appearance and specifications are subject to change without notice.
0800 169 0408