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  • PCI Express to USB Card
  • USB 3.0
  • Up to 5.0 Gbps Data Transfer Rate

  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Providing speeds up to 10x faster than that of USB 2.0, this PCI Express USB 3.0 card enables you to access your data and transfer files much faster than USB 2.0, by adding two USB 3.0 ports to your PCI Express capable PC.

Featuring a native NEC PCI Express host controller chipset, the new USB 3.0 standard supports transfer rates of up to 5Gbps, while still providing connectivity and support for the older USB 2.0 (480Mbps) and 1.1 (12Mbps) devices.

In addition to providing a much faster transfer rate the PEXUSB3S2 USB 3.0 card also supplies 900mA of power per USB port, allowing more and more external devices to operate without the need of an additional power source.

  • newegg Add USB 3.0 Port to Your Computer The StarTech PEXUSB3S2 USB 3.0 card is designed to add two USB 3.0 ports to any PCIe-enabled computer, providing blistering fast connection of up to 5Gbps to the next generation peripherals.
  • newegg PCIe x1 Interface The StarTech PEXUSB3S2 USB 3.0 card utilizes PCIe x1 interface to provide adequate bandwidth and reduce bottleneck for best possible performance.
  • newegg Dual Bracket Low profile expansion bracket is included to replace the full-height expansion bracket required on some computer models.

Learn more about the STARTECH PEXUSB3S2




PCI Express to USB Card
External USB Ports
2x USB Ports
USB 3.0
Data Transfer Rate
Up to 5.0 Gbps
Operating Systems Supported
Windows 2000/ XP(32/64bit)/ Server 2003(32/64bit)/ Vista(32/64bit)/ 7(32/64bit)/ Server 2008 R2


Backwards compatible with previous USB standards
Compliant with PCI Express 2.0 specs
Fully compliant with USB 3.0 revision 1.0 specifications and Intel xHCI rev0.96 specifications
Fully supports the following USB Communication Types: Control/Bulk/Interrupt/Isochronous Transfer
Provides up to 900mA per USB port
Support USB transfer speeds of 5Gbps (Super Speed), 480Mbps (High Speed), 12Mbps (Full Speed), and 1.5Mbps (Low Speed)
Supports PCI Bus Power Management Interface Specification revision 1.2
Supports up to 127 USB devices connected to a single interface. (Requires additional USB hubs to obtain this number)
USB ports are Hot Swapping and Plug-and-Play compliant

Dimensions & Weight


Additional Information

Date First Available
March 01, 2010
Warranty, Returns, And Additional Information
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by's Standard Return Policy.
Ownership: 1 week to 1 month
Verified Owner
4/ 5
Works good 7/5/2014 9:20:21 PM

Pros: Small, molex power not required unless you're powering something, seems to work good so far. It appears to be well made and has a nice finish to it.

Cons: I wish the included sata -> molex cable was a bit longer. If I end up having to use it in the future its going to be hanging right across the CPU fan. No big deal for my application but someone who was cable managing might have some trouble with it.

Overall Review: Card worked without any trouble in my home server. HP ML110 G6 with windows 7 pro x64. Makes for backing up 2+TB of data a bit easier than USB 2.0 - hope to get some solid life out of it.

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Ownership: 1 day to 1 week
Verified Owner
5/ 5
Works as advertised 3/12/2014 4:11:29 PM

Pros: Controller works as promised with better performance. Works with both Server 2008R2 & Win7-64.

Cons: None really.

Overall Review: I ran some benchmark tests after getting this controller running on an ASUS P5Q Deluxe board. Older board for sure but worked fine on both OS’s. Tested using the following disks using both PassMark & CrystalMark.

Disk1 – Seagate USB3 STDR2000100 portable
Disk2 – Transcend USB2 TS1TSJ25M2 portable connected to USB3 controller
Disk3 – Transcend USB2 TS1TSJ25M2 portable connected to onboard USB2

CrystalMark PassMark
Disk1 = 110.30 MB/s 34.18 MB/s
Disk2 = 36.60 MB/s 13.78 MB/s
Disk3 = 32.20 MB/s 9.92 MB/s

So, you can see I am getting between 14%-39% improvement just with this controller depending upon the test used. Switch to a USB3 disk and I’m getting 343%-345% improvement over a USB2 disk and motherboard controller. For $30 am quite happy.

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Ownership: more than 1 year
Verified Owner
1/ 5
Very VERY unreliable! 1/21/2014 7:03:46 PM

Pros: Price

Cons: You get what you pay for - cheap UNRELIABLE adapter. I've had 2 of these installed in Windows 7, 8, 8.1, Small Business Server 2008, and Server 2012 R2 - always the same problem - the controller freezes with the only solution to reboot the system

I've updated the firmware on these - the problem remains - freezes sporadically

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Ownership: 1 month to 1 year
Verified Owner
5/ 5
Works very well with Win 8.1 64bit 12/7/2013 4:08:00 AM

Pros: Purchased several USB 3 PCIe adapters to use on Win 7 64 bit and on Win 8.1 64 bit. This is the only one that works on Win 8.1 64 bit! Use win 8 native drivers.

Cons: Needs more ports

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Ownership: 1 month to 1 year
Verified Owner
4/ 5
Great Performance with One Flaw 9/12/2013 10:29:00 PM

Pros: - Fantastic Performance
- Easy Install
- Took 3 seconds to copy a 745mb ISO from OCZ Vertex 4 SSD to a 16gb USB 3.0 Sandisk Extreme memory stick

Cons: - Mine needed firmware update which was not easy to find
- Best drivers are not on StarTech's site. I had to go to Renesas site to obtain them.

Overall Review: - Mine needed firmware update which was not easy to find
- Best drivers are not on StarTech's site. I had to go to Renesas site to obtain them.


I also need to point out that a previous reviewer claimed the reason why you cannot boot from a device attached to this card is because the driver isn't loaded and tried to say this was somehow like a video card requires drivers.


If that were the case, you wouldn't be able to boot from PCI-Express SATA cards, or old school PCI-Express IDE/Firewire cards. Well... you can! The reason why this card cannot be booted from is due to the card not having a boot rom chip which allows the bios to understand what kind of device it is and how it works. Think of it as a driver that's built into the card. ALL bootable devices, including video cards and just about every storage controller in your computer have their own little boot ROM, which is why many motherboard manufacturers include updates for these boot rom chips on occasion as part of a BIOS update.

All too often I see people on Newegg select the highest level of tech experience when they are nowhere near it. What I posted about boot roms is very basic knowledge that even a moderately skilled person should know and understand.

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Ownership: 1 month to 1 year
Verified Owner
5/ 5
Excellent 7/3/2013 1:43:20 PM

Pros: Easy installation with downloaded drivers.

Works in Windows Server 2008 R2 (Hyper-V)

Cons: None so far.

Overall Review: Be sure to update the firmware.

Using 7200 rpm laptop drives in Orico cases and sustain write speeds of 85 MBs.

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Ownership: 1 day to 1 week
Verified Owner
5/ 5
Another solid product from StarTech - I'm getting used to that :) 6/8/2013 9:58:55 AM

Pros: - works in Windows Server 2008 R2 (64-bit), plugged into PCI Express x16 bus (though it requires only PCI-E x1, which my server was out of)
- trivially easy installation from the CD. if only all storage controllers installed so smoothly....
- throughput - on a 4+ year old motherboard from Gigabyte, it allows minimum of 110-120MB/sec sustained read performance on my USB 3.0 storage devices (USB 3.0 ThumbStick, Seagate 500GB 2.5" external backup, Corsair AirVoyager 1TB 2.5" external backup); I didn't test write throughput, but I expect to see numbers comparable to eSATA-connected devices.
- I owned another StarTech product, 2x eSATA ExpressCard for my laptop, for over 3 years, and found that one very reliable (the manufacturer even included a piece of plastic stabilizing the narrow card in a wide ExpressCard socket, which was a nice surprise). it didn't quit on me yet, so I expected this PCI Express card will not quite on me too soon either.
- attractive price - the card gives me all it promises and all I want for a price I'm happy to pay.

Cons: - after plugged in and the system was booted, Windows Server 2008 R2 showed a problematic device in USB controllers section in Device Manager. I tried updating the drive automatically (from Web, Windows Update etc.) but that didn't work. I admit, I'm a little spoiled by devices that you plug in, and Windows finds drivers for them immediately (for more than 10 years, with the exception of certain printers).
Not a big deal here - the provided CD allowed smooth installation of the proper driver, with absolutely no issues. I didn't even have to go to StarTech's website to find a driver, all I needed was in the box.
- the card requires additional power, through a Molex connector. the box includes a Molex-to-SATA converter, but it's a short one, I could use one 2 times as long. I had a problem rearranging my power supply cables to provide power for this card (it's very short). Seriously, the manufacturer should assume that all Molex/SATA power cables leading from the PSU are often leading very far from the card's location (to hard drives/optical drives), so sometimes it may be impossible to provide power to the card without re-arranging hard drives in the system.
I could have also gone and bought a longer power splitter/plug converter cable, but that's an extra few $ and a trip I don't want to be wasting time on. Please provide me everything I need in the box, even if I have to pay $3-$5 more.

Alternatively there could be a cable converting power from those 6- and 8-pin PSU cables used for video cards (I'm not sure about the voltages, perhaps that's not a feasible option).

Overall Review: It's hard to find any real con for this product. Maybe it will quit working on me too soon, but that's not the experience I had with StarTech. I'm slowly becoming a loyal fan and remembering the brand when I talk to others about hardware-related topics.

I ordered another StartTech product, USB 3.0 ExpressCard for my laptop. My expectation is I'll see the same solid build, durability, reliability, ease of installation, and performance.

So far, despite minor glitches (most of them have to do with non-automatic driver installation) I can recommend StarTech to anyone.

2 out of 2 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
excellent product 5/25/2013 10:42:08 AM

Pros: Super easy firmware update, driver install for 2011 Windows Home Server. Went to web site downloaded updates for Server 2008 R2 which is the basis of 2011 Windows Home Server. Ran firmware update which auto detects firmware and updates. Same for Driver. Plugged in USB 3.0 drive and started backups.

Cons: None.

Overall Review: Down load driver from web site. Read notes and install instructions. Drivers must be uninstalled and any software for device unloaded before new driver installation.

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