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Item#: N82E16839158046

StarTech ECUSB3S254F 2 Port Flush Mount ExpressCard 54mm SuperSpeed USB 3.0 Card Adapter

  • 2 x USB 3.0
  • 5.0 Gbps
  • Flush-mount form factor
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The ECUSB3S254F 2-Port Flush Mount USB 3.0 ExpressCard Adapter uses a unique form factor design that allows it to sit fully in a standard 54mm laptop ExpressCard slot without sticking out.

When inserted, the USB 3.0 ports provided by the ExpressCard adapter sit flush with the sides of the laptop, creating a seamless add-on that can be left installed even while on the move, without having to worry about impact damag to either the card or the ExpressCard slot.

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 12/1.5 Mbps respectively - the perfect laptop accessory for users to connect USB devices, both new and old.

  • newegg Optional Power Connector The ECUSB3S254F 2-Port Flush Mount USB 3.0 ExpressCard Adapter features an optional external power connector allowing for more power for high-powered USB peripherals.
  • newegg USB 3.0 Interface and USB 2.0 Compatibility SuperSpeed USB 3.0 delivers up to 5Gbps bandwidth which is around 10 times the bandwidth of the current USB 2.0, allowing for ultra-fast transfers of high definition movies and videos, as well as various other large capacity file formats. The ECUSB3S254F 2-Port Flush Mount USB 3.0 ExpressCard Adapter is also backward compatible with USB 2.0/1.x connection.
  • newegg Unique Flush Mount Design The Unique flush mount design fits seamlessly into ExpressCard/54 slots, eliminating the worry of snagging or hitting the card.

Learn more about the STARTECH ECUSB3S254F




USB ExpressCard
USB 3.0
Data Rates
5.0 Gbps
2 x USB 3.0
ExpressCard slot
0°C to 85°C (32°F to 185°F)
2.13" x 2.91" x 0.2"
Operating Systems Supported
Windows XP(32/64-bit)/ Server 2003(32/64-bit)/ Vista(32/64-bit)/ Server 2008 R2/ 7(32/64-bit)


Unique flush-mount form factor design

Two SuperSpeed USB 3.0 compliant ports with support for transfer rates up to 5 Gbps

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)

Chipset ID: NEC uPD720200


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.

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

Compatible with Dell Latitude E5530

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

ExpressCard USB 3 Controller / 5 Gbps USB 3.0 Expresscard / Expresscard Laptop Card

2Port USB 3.0 Adapter Card 54mm USB3 Card / EC USB 3.0 Card with UASP

2 Port Notebook USB 3.0 Express Card with optional built-in external DC power connector

Expand laptop expansion capabilities with additional USB ports

Quick Info


  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years

Customer Reviews of the STARTECH ECUSB3S254F

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  • Jason R.
  • 3/29/2014 1:27:52 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsWorks well with updated drivers/fw

Pros: Full USB3 speeds. Short profile means it is flush with the end of my expresscard slot

Cons: Did not automatically pick up the correct drivers.

Other Thoughts: I bought this for a Lenovo X220 running Windows 8.1. I plugged in the card and installed drivers, but my laptop acted quite funny. The mouse wouldn't track smoothly and video on the screen was choppy. Also, USB drives I plugged in wouldn't be detected. Things would work properly after a reboot, but after letting the laptop go to standby, the issues returned. I checked in Device Manager and saw that Windows was using the built-in Microsoft drivers instead of the Renesas ones I installed. Right-clicking and saying "update drivers automatically" told me the best drivers were already installed. So I went back in and manually selected the Renesas drivers. Lo and behold, everything works much better now :).

Also, if you go to StarTech's website, there is an updated driver to use. Inside the folder, there is also a firmware update. I applied it.

Did you find this review helpful? Yes No

  • Jeremiah S.
  • 11/16/2013 12:48:02 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsWorks well enough to get another one!

Pros: - Works as described

- Comes with the power adapter cable for external drives without their own power source.

- Data transfer is reliable and fast for my uses

- I can hot-plug / hot-eject while the computer is on (as long as I pay attention and make sure all processes using the drive have been terminated)

Cons: - when plugging in an external drive without power, sometimes I get the "this drive is faster if you plug it into a high speed port" even though the external power adapter is plugged into the wall

Other Thoughts: One more for the "Cons", but this is not a fault of the manufacturer, just a fault of the ExpressCard design in general:

It's nice to be able to use a little pressure when plugging devices in to make sure the plug is fully/properly seated, but if you do that on this device, it may eject the card so you always have to be careful when plugging in, especially while the computer is on.

Did you find this review helpful? Yes No

  • Michael B.
  • 11/6/2013 10:00:39 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsDoes the job

Pros: Works as advertised in my 4 year old Lenovo T400. Gives full USB 3.0 speeds to the USB 3.0 thunb drives I've attached to it.

Cons: USB 3.0 sockets a little tight getting in, a tendency to pull the card out of the laptop when pulling the USB drive off the card.

0 out of 1 people found this review helpful. Did you? Yes No

  • Adam D.
  • 7/20/2013 8:26:16 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week

1 out of 5 eggsHave to reboot thelaptop to get drives to mount

Pros: Nice, flush design.

Cons: It won't recognize connected USB3 hard drives unless I reboot the laptop. I updated the firmware and the driver to the latest available from StarTech website. I tried older drivers too to no avail. I disabled USB3 power management, same results. So it's pretty useless to me. I don't want to reboot the laptop every time I connect a USB3 drive. I'll be returning it. I give it 2 stars for neat, flush design, but unfortunately it doesn't mean a lot since the card doesn't work well. This seems to be a common issue with Renesas USB3 controller judging by the number of forum posts on Dell, Lenovo, HP, etc. websites.

Other Thoughts: Dell Latitude E6410, Windows 7 x64

1 out of 1 people found this review helpful. Did you? Yes No

  • Michael B.
  • 4/28/2013 10:03:43 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWorks as advertised, fixes major oversight by dell

Pros: Gives me USB 3.0 speeds for accessing a 2 TB 2.5" external. The PCI-E lane on my Dell XPS 1645 powers the HDD too. Observed sustained 60MBps data transfer to and from the HDD, which should be around the max for this little drive. Fits flush with the slot and fills the whole slot, so it looks good, too.

Cons: None to speak of, may need external power for some 2.5" drives in some systems, or 2 2.5" drives

Other Thoughts: Managed to fix a major oversight by Dell (USB 3.0 was new in 2009, but hey, it was a top of the line laptop).

Did you find this review helpful? Yes No

  • Joshua P.
  • 4/11/2013 1:50:32 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsGarbage

Pros: None

Cons: This thing is a piece of garbage, the tech support is useless and just wants you to install driver after driver until hopefully something magic happens and they work. I still can't use it as it doesn't want recognize the controller. It worked once... but after that I couldn't read or write to the drive it just saved the index... great

1 out of 1 people found this review helpful. Did you? Yes No

  • Joseph D.
  • 3/3/2013 12:57:16 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsConfirmed Power Issue

Pros: Definitely delivers on the USB 3.0 speeds and compatibility. I was able to get this working with both a LaCie Rugged 500GB and a HGST Touro Pro 1TB in both Windows 7 and Windows 8. However, the reviews are correct about the drivers being a pain in the a**.

Cons: The drivers are there, and that's nice but getting them to work was more trial and error than plug and play.

BIG Con is the power draw. I'm not sure what 2 USB 3.0 devices you could run at the same time, but I know that I tried both the LaCie and HGST mentioned above plugged at the same time and -- like other reviews have stated -- both drives drop out. And no, adding the power adapter (at least the USB to DC adapter supplied in the box) does NOTHING to avoid this issue.

The moral of the story -- don't try to run 2 drives at a time on this thing. It won't work.

Other Thoughts: You get what you pay for. I wish I knew where the gold standard is for an ExpressCard USB 3.0 adapter is, because I'd pay whatever I needed to so that I could have it. I suppose with these ports coming standard on most laptops today it's a moot point, but I still have a few years left on my XPS Studio 17 and Latitude E6500 series laptops.

3 out of 3 people found this review helpful. Did you? Yes No

  • Christopher M.
  • 2/22/2013 8:32:25 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsWorked sometimes, then died

Pros: Installs flush which is great for my application. It was very fast when it worked.

Cons: Driver support/instructions were terrible. I had to read reviews on here and other sites to figure out which files on the CD to use. Then I updated to newer drivers and firmware also described in online reviews. It would work fine for a while, then disappear requiring either a reboot or ejecting and pushing the card back in. It finally quit working all together, and isn't recognized by several different computers. Outside of 30 days so I'm out $40. I just ordered 2 different cards from another site for $10 shipped each. Hopefully one will work.

Other Thoughts: If this worked all the time as it did sometimes, I could have overlooked the short comings with the drivers/instructions. Even if it still worked, it only intermittently worked for me in Win 7 anyways. Now that it's dead, it's good only for keeping dust out of the slot.

2 out of 2 people found this review helpful. Did you? Yes No

  • richard s.
  • 12/28/2012 6:37:20 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsSEEMS FINE NOW

Pros: FLUSH MOUNTING and also comes with power cable to boost power from another usp port if your machine lacks enough power from its native port. pleased to have 3.0 on this notebook.

Cons: DRIVER HASSLE... supplied cd is worthless. 2nd download from site and it installed normally. MAY unplug if not held in when removing flash drive... not a big deal.

did get a copy failure when it said the filename was too long. never had that problem on 2.0. it just truncated instead of continuing to copy and leaving message about file not transfered. maybe its an xp problem.

Other Thoughts: Tech support responded to email in reasonable time, with a detailed note. overall pleased at this writing.

1 out of 1 people found this review helpful. Did you? Yes No

  • richard s.
  • 12/20/2012 5:13:02 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner


Pros: IF it worked, it would be great.. fits flush. luckily i have another brand [sticks out tho] so i can have 3.0 but thats a pain. tried latest driver offline. my dell precision m6300 simply does not recognize it

Cons: doesnt work

Other Thoughts: may rma if not solved in a week.

3 out of 3 people found this review helpful. Did you? Yes No

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Item#: N82E16839158046
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