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Item#: 9SIA24G28M8441

StarTech 2 Port PCI Express PCIe SuperSpeed USB 3.0 Controller Card w/ SATA Power Model PEXUSB3S23

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

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the STARTECH PEXUSB3S23




PCI Express to USB Card
External USB Ports
2x USB Ports
External Ports
2 x USB 3.0 A (9 pin; SuperSpeed) Female
Internal Ports
1 x SATA Power (15 pin) Plug
USB 3.0
Data Transfer Rate
Up to 5.0 Gbps
Operating Systems Supported
Windows 8 (32/64bit), 7 (32/64), Vista(32/64), XP(32/64)
Windows Server 2008 R2 , 2003 (32/64)
1 x PCI Express x1 Male


Provides two external USB 3.0 connections

Supports data rates up to 5 Gbps

Compliant with PCI Express 2.0 specifications

Optional SATA power connector provides up to 900mA per USB port

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

Add two USB 3.0 ports to your desktop computer through a PCI Express slot

Compatible with HP Pro 6300 / Lenovo ThinkCentre M93p

2 Port PCIe SuperSpeed USB 3.0 Card Adapter / 2Port USB 3.0 Controller Card

USB 3.0 PCIe Card / PCIe USB 3.0 Card

SATA Powered USB 3.0 PCI Express Card / PCI Express USB 3.0 Expansion Card / Two Port 5 Gbps USB 3.0 Card

Desktop PCIe USB 3 Expansion Card / Add USB 3.0 Ports to a Desktop

Desktop USB 3.0 Adapter Card includes a Low Profile/half-height bracket

Dimensions & Weight



Package Contents
1 x PCI Express USB 3.0 card
1 x Low Profile Bracket
1 x Driver CD
1 x Instruction Manual
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Customer Reviews of the STARTECH PEXUSB3S23

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  • Vitaly B.
  • 4/27/2016 7:20:57 PM

1 out of 5 eggsA piece of garbage

Pros: None

Cons: It cannot make more than 125 MB/s Read. Obviously Writes are no more than 110 MB/s. It is not a USB 3.0 card. It is just less than double compared to USB 2.0 specs. Tested both in ATTO and CDM

Other Thoughts: Do not buy it, not worth it

Did you find this review helpful? Yes No

  • Kung C.
  • 9/15/2015 7:40:11 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsGood product

Pros: Fast shipping ! Work as designed. Getting 2-3X the speed of USB 2.0. Good to have SATA power connector so that the USB 3.0 can run large external hard drives.

Cons: None I can find.

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  • Timothy O.
  • 11/7/2014 7:24:51 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsStarTech USB card

Pros: had to disable the "boot from USB" option in BIOS to get my external drive to show up after rebooting my pc. Kind of annoying. However, usb 3.0 speeds are consistent and stable.

Cons: sometimes drive gets "lost" and I have to unplug-replug the USB cable for external drive to show up. Rarely, though.

Other Thoughts: good value overall, but some goofy side effects.

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

  • Paul W.
  • 5/9/2014 9:11:16 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsEasy Install

Pros: Easy to install on an Asus P755D MBD. running Windows 7 64 bit. Windows asks for the drivers, just run the disk. I already had 2 USB 3.0 needed more and this card works. Same speed as the on board USB 3.0

Cons: None

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

  • Chris D.
  • 4/6/2014 7:54:26 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsIt works, finally

Pros: An 8gb file can now be copied in 1:39.
Fairly easy setup if instructions were corrected.

Cons: First card I received was bad and it took from 3/19/14 when the RMA was approved until 4/4/14 to receive the new card.
The new card wouldn't work when installed according to the enclosed instructions.

Other Thoughts: The first card I received did not work. It would install, but windows said it "may not work properly". I tried it in a different machine as requested by StarTech tech support. Still did not work. StarTech sent me a new driver but that would not install saying the already installed driver was newer. I RMA'd the card back to NewEgg. It took an inordinate amount of time to send out the new card with 5-7 day shipping even though I am eligible for 2 day shipping through shoprunner. When I finally got the new card, it installed correctly but would not detect any devices I plugged into it. Another chat with tech support. The instructions clearly state that connection of a 15 pin SATA power connector is optional and only needed if using bus-powered USB devices. Tech support say that is not accurate and that I needed to plug power into the card. Once I did that the card worked fine. I feel like this was a long drawn out fiasco, but in the end the product is working as intended.

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

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Item#: 9SIA24G28M8441
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