2 Port Flush Mount ExpressCard 54mm SuperSpeed USB 3.0 Card Adapter with UASP Support

Add two flushmount USB 3.0 ports to your ExpressCard-enabled laptop

Product ID: ECUSB3S254F

  • Unique flush-mount form factor design
  • Two SuperSpeed USB 3.0 compliant ports with support for transfer rates up to 5 Gbps
  • UASP support for more efficient data transfer
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  • Backward compatible with USB 2.0/1.x devices
  • Compliant with USB 3.0 base specification 1.0 and xHCI specification 0.95
  • Compliant with PCI Express specification 2.0
  • Built-in external DC power connector (optional)
$76.99 CAD
864+ In stock
In stock
CA: 10 | US: 854
In stock
Where To Buy


The ECUSB3S254F 2-Port Flush Mount USB 3.0 ExpressCard Adapter lets you add two USB 3.0 ports to your ExpressCard-enabled laptop.

The USB 3.0 card uses a unique design that allows it to sit flush in a standard 54mm laptop ExpressCard slot, creating a seamless add-on that can be left installed even while on the move, without having to worry about impact damage to either the card or the ExpressCard slot.

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 SuperSpeed USB 3.0 Card supports data transfer rates of up to 5Gbps, and is backward compatible with USB 2.0 (at up to 480Mbps), or USB 1.1/1.0 at up to 1.5/1.2 Mbps respectively - the perfect laptop accessory for users to connect USB devices, both new and old.

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

  • Eliminate the worry of snagging or hitting the ExpressCard with a unique Flush Mount design
  • SuperSpeed USB 3.0 connectivity at up to 5 Gbps, while still backwards compatible with USB 2.0/1.x
  • Time-saving file transfers, up to 70% faster than traditional USB 3.0 when used with a UASP-supported enclosure


Users who need USB connectivity, but do not need to swap between other ExpressCard adapters, so will leave the card installed in the card slot

Mobile users who want to leave ExpressCard adapters installed, without worry about damaging the card or slot while on the move

Connect high performance USB 3.0 external storage devices to a laptop

Upgrade an older laptop with USB 3.0 connectivity

Expand on your laptop expansion capabilities with additional USB ports

Technical Specifications

Warranty Information
Warranty 2 Years
Bus Type ExpressCard
Card Type 54mm ExpressCard
Chipset ID Renesas/NEC - µPD720200
Interface USB 3.0
Ports 2
Type and Rate USB 3.0 - 5 Gbit/s
UASP Support Yes
External Ports 2 - USB Type-A (9 pin) USB 3.0 Female
OS Compatibility Windows® 10 (32/64), 8 / 8.1 (32/64), 7 (32/64), Vista (32/64), XP (32/64)
Windows Server® 2008 R2, 2003
Special Notes / Requirements
Note The maximum throughput of this card is limited by the host bus interface. If used with ExpressCard Gen 1.0 enabled computers, the max throughput is 2.5 Gbps. If used with ExpressCard Gen 2.0 enabled computers, the max throughput is 5 Gbps.
System and Cable Requirements Available ExpressCard/54 slot
Center Tip Polarity Positive
Output Voltage 5 DC
Plug Type A
Power Source Not Included (not required for standard applications)
Operating Temperature 0°C to 85°C (32°F to 185°F)
Storage Temperature -65°C to 125°C (-85°F to 257°F)
Physical Characteristics
Product Height 0.2 in [5 mm]
Product Length 2.9 in [74 mm]
Product Weight 0.9 oz [25 g]
Product Width 2.1 in [54 mm]
Packaging Information
Shipping (Package) Weight 3.7 oz [105 g]
What's in the Box
Included in Package 1 - ExpressCard USB 3.0 Card
1 - USB to DC Power Adapter Cable
1 - Driver CD
1 - Instruction Manual


View full OS compatibility
Windows® 10 (32/64), 8 / 8.1 (32/64), 7 (32/64), Vista (32/64), XP (32/64)
Windows Server® 2008 R2, 2003


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2 Port Flush Mount ExpressCard 54mm SuperSpeed USB 3.0 Card Adapter with UASP Support

Customer Reviews

3.4 (5 reviews)
3.4 out of 5 stars
Quality of Product
Tell us what you think of this product.

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1 - 5 of 5 Reviews

(3 stars) Works, but has issues.

Driver installation was difficult. If you purchase more than one of these cards, interchanging them across different PCs wont work. Each card comes with an accompanying CD and you MUST install it's paired CD on your computer to use it. This seems to be a very sloppy method to install product drivers. The unit once installed properly does function as a set of two USB 3.0 ports. I use it to interact with a USB monitor adapter and have not had any issues for 2+ years running. The external jack seems to be broken as I was trying to run a USB3 vision camera with this card and did not have any luck. This was when I wired the external power cable to a phone charger for power. External jack is broken? All in all this product works, but it has its hiccups.
Comment Helpful? Yes - 0 No - 0 Report

(4 stars) very good support service!

My unity doesn't works at all and driver never could be installed. After a very poor review , the support service contacted me and in a brief chat by e-mail they fixed the problem, so my unit now work at the best . Thank you! 4 stars because the driver not installs automatically on dell 640M with xp sp3 (italian releasing). For the support 5 (FIVE!!!!!) stars!!!!
Comment Helpful? Yes - 1 No - 1 Report

(1 star) Very slow!

This card's USB 3.0 port transmits data slower than PC's USB 2.0 port.
Comment Helpful? Yes - 0 No - 3 Report
Response from
Barry, Customer Support
Hello Aleksandr, Thanks for sharing your review with us. There are a lot of factors that could be affecting the speed you are seeing when using this card, such as; - The model of your laptop and if has Gen 1 or Gen 2 ExpressCard/PCIe slots. - If you are using the best and most up to date drivers for this card and chipset of your PC. - Up to date BIOS. Other factors can affect speeds as well depending on your setup. For further information, you can always speak with our technical advisors by clicking the "Support" tab on our site. Thank you, Barry Customer Support

(4 stars) Good add on for an older laptop

I just received this earlier and it installed without issues using the drivers i took down from Startech. The speed is noticeably faster than the USB 2.0 ports and makes using this card a good choice.
Quality of Product (4/5)
Comment Helpful? Yes - 2 No - 2 Report

(5 stars) Brilliant Product

Arrived today!! StarTech 2 Port Flush Mount ExpressCard 54mm SuperSpeed USB 3.0 Card Adapter Up and running within seconds. The answer to all my USB problems. My lady needed to do an important report and needed to use a USB key. No problem, StarTech worked like a dream.
Quality of Product (5/5)
Comment Helpful? Yes - 1 No - 3 Report