4 Port PCI Express (PCIe) SuperSpeed USB 3.0
Card Adapter w/ 2 Dedicated 5Gbps Channels UASP - SATA / LP4 Power
Product ID: PEXUSB3S42V
The PEXUSB3S42V 4-Port PCI Express USB 3.0 Card lets you add four USB 3.0 ports with two dedicated 5
Gbps channels to your PCIe x4-enabled PC. This independent port architecture improves USB 3.0
performance by transferring data on two 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 a second host controller chipset, the transmission channel is
shared across two ports rather than four. Dedicating up to 5 Gbps for each set of two ports reduces
performance bottlenecks, and effectively doubles your total available to bandwidth to 10 Gbps.
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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
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.
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Certifications, Reports
and Compatibility
Applications
• 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
Features
• Provides four external, USB 3.0 Ports on two independent bus
channels
• Supports up to 10 Gbps total transfer bandwidth - Up to 5 Gbps per
two ports
• 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
specifications
• 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
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Warranty 2 Years
Hardware Bus Type PCI Express
Card Type Standard Profile (LP bracket incl.)
Chipset ID 2 x Renesas / NEC - µPD720202
Industry Standards USB 3.0 Specification Rev. 1.0
USB Battery Charging Specification Rev. 1.2 (Apple Mode
only)
PCI Express Base Specification Rev. 2.0
Intel xHCI Specification Rev. 1.0
Interface USB 3.0
Port Style Integrated on Card
Ports 4
Performance Maximum Cable Length 9.8 ft [3 m]
Maximum Data Transfer Rate 5Gbps per 2 ports - 10Gbps Total
Type and Rate USB 3.0 - 5 Gbit/s
UASP Support Yes
Connector(s) 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
Software OS Compatibility Windows® Vista, 7, 8, 8.1, 10
Windows Server® 2008 R2, 2012, 2012 R2, 2016
Linux 2.6.31 to 4.4.x LTS versions only
Special Notes /
Requirements
System and Cable Requirements Available PCI Express x4 or greater slot
Environmental Humidity 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)
Physical
Characteristics
Product Height 4.7 in [120 mm]
Product Length 6.6 in [167 mm]
Product Weight 3.2 oz [90 g]
Product Width 0.6 in [15 mm]
Packaging
Information
Shipping (Package) Weight 7.1 oz [200 g]
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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.
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