StarTech.com 4-Port PCI Express USB 3.0 Card

Manufacturer: Startech | Model: PEXUSB3S42 | Product ID: 1937 | Warranty: 2 Years
£33.40 (inc. VAT)
21 in stock
100% Money Back Guarantee - Risk Free

Product Technical Specification

Ports & interfaces
Host interfacePCIe
Output interfaceUSB 3.2 Gen 1 (3.1 Gen 1)
Expansion card form factorFull-height / Low-profile
Expansion card standardPCI 2.0
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity4
Design
InternalYes
Product colourBlack,Stainless steel
Maximum cable length3
Hot-swapYes
CertificationCE, FCC
Features
Chipset2 x Renesas / NEC - µPD720202
Data transfer rate (max)5
UASP supportYes
Operational conditions
Operating temperature (T-T)5 - 50
Storage temperature (T-T)-20 - 60
Operating relative humidity (H-H)20 - 80
System requirements
Windows operating systems supportedWindows 10 Education,Windows 10 Education x64,Windows 10 Enterprise,Windows 10 Enterprise x64,Windows 10 Home,Windows 10 Home x64,Windows 10 Pro,Windows 10 Pro x64,Windows 7 Enterprise,Windows 7 Enterprise x64,Windows 7 Home Basic,Windows 7 Home Basic x64,Windows 7 Home Premium,Windows 7 Home Premium x64,Windows 7 Professional,Windows 7 Professional x64,Windows 7 Starter,Windows 7 Starter x64,Windows 7 Ultimate,Windows 7 Ultimate x64,Windows 8,Windows 8 Enterprise,Windows 8 Enterprise x64,Windows 8 Pro,Windows 8 Pro x64,Windows 8 x64,Windows 8.1,Windows 8.1 Enterprise,Windows 8.1 Enterprise x64,Windows 8.1 Pro,Windows 8.1 Pro x64,Windows 8.1 x64,Windows Vista Business,Windows Vista Business x64,Windows Vista Enterprise,Windows Vista Enterprise x64,Windows Vista Home Basic,Windows Vista Home Basic x64,Windows Vista Home Premium,Windows Vista Home Premium x64,Windows Vista Ultimate,Windows Vista Ultimate x64,Windows XP Home,Windows XP Home x64,Windows XP Professional,Windows XP Professional x64
Linux operating systems supportedYes
Server operating systems supportedWindows Server 2008 R2,Windows Server 2012
Technical details
Sustainability certificatesRoHS
Weight & dimensions
Width15
Depth167
Height120
Weight90
Packaging data
Mounting brackets includedYes
Drivers includedYes
ManualYes
Package width171
Package depth144
Package height30
Package weight141
Logistics data
Harmonized System (HS) code84733020

Delivery Options

Economy Delivery
FREE
Economy Delivery

Economy Delivery (UK)

Estimated delivery date: Sun 07th Dec 2025 to Wed 10th Dec 2025
Business Express
£6.95
Business Express

Business Express

Estimated delivery date: Sat 06th Dec 2025 to Mon 08th Dec 2025
View all Delivery Options & International Rates
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.

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.

The StarTech.com Advantage
- Increase the efficiency of your USB 3.0 devices with two dedicated bus channels and up to 5 Gbps of bandwidth per channel
- 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 LP4 or SATA power connector
Ports & interfaces
Host interfacePCIe
Output interfaceUSB 3.2 Gen 1 (3.1 Gen 1)
Expansion card form factorFull-height / Low-profile
Expansion card standardPCI 2.0
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity4
Design
InternalYes
Product colourBlack,Stainless steel
Maximum cable length3
Hot-swapYes
CertificationCE, FCC
Features
Chipset2 x Renesas / NEC - µPD720202
Data transfer rate (max)5
UASP supportYes
Operational conditions
Operating temperature (T-T)5 - 50
Storage temperature (T-T)-20 - 60
Operating relative humidity (H-H)20 - 80
System requirements
Windows operating systems supportedWindows 10 Education,Windows 10 Education x64,Windows 10 Enterprise,Windows 10 Enterprise x64,Windows 10 Home,Windows 10 Home x64,Windows 10 Pro,Windows 10 Pro x64,Windows 7 Enterprise,Windows 7 Enterprise x64,Windows 7 Home Basic,Windows 7 Home Basic x64,Windows 7 Home Premium,Windows 7 Home Premium x64,Windows 7 Professional,Windows 7 Professional x64,Windows 7 Starter,Windows 7 Starter x64,Windows 7 Ultimate,Windows 7 Ultimate x64,Windows 8,Windows 8 Enterprise,Windows 8 Enterprise x64,Windows 8 Pro,Windows 8 Pro x64,Windows 8 x64,Windows 8.1,Windows 8.1 Enterprise,Windows 8.1 Enterprise x64,Windows 8.1 Pro,Windows 8.1 Pro x64,Windows 8.1 x64,Windows Vista Business,Windows Vista Business x64,Windows Vista Enterprise,Windows Vista Enterprise x64,Windows Vista Home Basic,Windows Vista Home Basic x64,Windows Vista Home Premium,Windows Vista Home Premium x64,Windows Vista Ultimate,Windows Vista Ultimate x64,Windows XP Home,Windows XP Home x64,Windows XP Professional,Windows XP Professional x64
Linux operating systems supportedYes
Server operating systems supportedWindows Server 2008 R2,Windows Server 2012
Technical details
Sustainability certificatesRoHS
Weight & dimensions
Width15
Depth167
Height120
Weight90
Packaging data
Mounting brackets includedYes
Drivers includedYes
ManualYes
Package width171
Package depth144
Package height30
Package weight141
Logistics data
Harmonized System (HS) code84733020

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Buykingston order despatch times:

We will despatch your order the very same day if we receive cleared payment by 12:00 pm Mon-Fri.

These delivery estimates apply when you order up to 12:00 pm Mon-Fri (excluding public holidays).

We charge a one off delivery cost as outlined below regardless of how many items you order or the weight of your order.

Estimated delivery times are provided to us by the respective delivery companies. We pass this information onto you, the customer.

Despatch times do not apply to UK public holidays.

Estimated delivery times are taken from the next available working day available for delivery. For example if an order was despatched on a working Wednesday by 3pm, the first available working day for delivery would be Thursday provided you placed your order by 3pm on the Wednesday. If the next available weekday is a UK bank holiday/public holiday then your order will be despatched on the next available working day.

Our warehouse reserves the right to upgrade the delivery method you select on your order.

Our available delivery options*

Contact us for a shipping quote.

*All delivery times are estimated unless stated.

Product Returns Note

Buykingston offers a very flexible and hassle free returns policy. If for whatever reason you are not happy with the item purchased you can return it to us within 12months for a refund (for unused and unopened items) or within 30 days on opened and used items for a refund. This applies to items purchased direct through Buykingston  only.

Our 30 Day Returns Money Back Guarantee Satisfaction Guarantee:
For items opened and used and that are returned in a resellable condition.

Our 365 Day Returns Money Back Guarantee Satisfaction Guarantee:
For items that remain sealed and unused.

Some items are excluded from our moneyback guarantee unless they have developed a fault. These include;

- Headphones
- Earphones
- Custom made and designed products such as flash memory products with custom logo’s on them. E,g USB flash drives and memory cards with your own logo

Returns FAQs

What is your returns criteria?
On opened items 30 days from date of receipt or expected date of receipt on non tracked items.
On unopened items 365 days.

How do i go about returning my order?
Please contact us via our contact page with your order number where we will present you with an RMA number and returns label.

Do i need to contact you before returning my order?
Yes, to obtain an RMA number.

Does my item have to include its original packaging?
Yes for items that fall within our 30 day money back guarantee and our 365 day returns. Of course for faulty items we realise you may no longer have the packaging.

Who deals with the warranty on a faulty item?
We will. In some circumstances we may ask you to contact the manufacturer direct for assistance.

Please ensure you have read and comply in full with Section 11 & 13 of our terms and conditions which you can read here in full.