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Allegro Express
5 Port USB 2.0 Adapter Card

Used | OWC Tested

Add more USB 2.0 ports to your PowerMac G5 or Mac Pro
Everybody's got USB peripherals-keyboards, mice, printers, scanners, joysticks, digital cameras, iPod® mobile digital devices, external drives-and there never seems to be enough ports on a computer to plug all of them in at the same time. Problem solved-install a Sonnet Allegro™ Express USB in your computer to add five more USB 2.0 ports! Considering a hub? Consider the trade offs. Every peripheral you plug in has to share a single port's bandwidth (potentially affecting the devices' performance), and you may have to plug it into a power outlet as well as your computer in order to operate some devices.

Sonnet's Allegro Express USB adds five full-bandwidth, high-speed USB connections to your computer without the need for an external box or AC power adapter-no trade-offs necessary. Each of this card's five powered ports supports bus-powered peripherals (devices that work without a separate power supply, including some external drives and scanners) and hi-speed data transmission.

With no drivers to install, this card offers simple plug and play installation in Mac and Windows computers. Allegro Express USB adds USB connectivity, outside and in, without compromise.


  • Simple way to add five USB 2.0 ports to any compatible computer
  • Easy installation-plug and play-no drivers to install
  • Support simultaneous low-, full-, and hi-speed device connections-maximizes performance for each port
  • Supports hot-swappable device connection-plug in and disconnect peripherals without shutting off your computer

Product Specifications

Manufacturer Part Number

  • USB2-E


  • Five USB 2.0


  • Internal - 1 Port
  • External - 4 Ports

External Connectivity

  • x4 USB 2.0 connectors

Internal Connectivity

  • x1 USB 2.0 connector

Form Factor

  • Standard PCI

Bus Specifications

  • PCI-Express x1

Operating System Support

  • Windows 7
  • Windows Vista
  • Windows XP SP 2
  • Mac OS X 10.3 or later(1)
  • OS X Lion compatible

Data Transfer Rates

  • USB 2.0 - 480Mbps (or 60MB/sec)
  • USB 1.1 - 12Mbps (or 1.5MB/sec)

OWC Tech Note

  • This product is not compatible with the Apple USB SuperDrive and MacBook Air SuperDrive. For a list of full machine compatibility with the Apple USB SuperDrive and MacBook Air SuperDrive, please see this Apple article.


  • Deep Sleep not supported under Mac OS X Version 10.4 or 10.3.


  • 3.70" x 2.67" (9.40cm x 6.80 cm)


  • 0.35 lbs
Manufacturer provided specifications for Sonnet Technologies p/n USB2-E UPC#: 732311005091


  • USB PCI Express Card
  • Quick Installation Guide


This product is compatible with... Learn how to find your Mac's model ID
Mac Pro
Mac Pro 8-Core (Mid 2010)
(July, 2010)
Model ID: MacPro5,1
Mac Pro
Mac Pro (Mid 2010 Quad-Core)
(July, 2010)
Model ID: MacPro5,1
2.8GHz, 3.2GHz, 3.33GHz
Mac Pro
Mac Pro (Early 2009 8-Core)
(March, 2009)
Model ID: MacPro4,1
2.26GHz, 2.66GHz, 2.93GHz
Mac Pro
Mac Pro (Early 2009 Quad-Core)
(March, 2009)
Model ID: MacPro4,1
2.66GHz, 2.93GHz, 3.33GHz
Mac Pro
Mac Pro (Early 2008)
(January, 2008)
Model ID: MacPro3,1
2.8GHz, 3.0GHz, 3.2GHz
Mac Pro
Mac Pro (8-core)
(April, 2007)
Model ID: MacPro2,1
Mac Pro
Mac Pro
(August, 2006)
Model ID: MacPro1,1
2.0GHz, 2.66GHz, 3.0GHz
PowerMac G5
Power Mac G5 (Late 2005)
(October, 2005)
Model ID: PowerMac11,2
2.0GHz, 2.3GHz, dual 2.5GHz
PC Desktop
PC running Windows, Linux or FreeBSD and available PCI-Express x1 lane or better slot
Sonnet Allegro Express 5 Port USB 2.0 Adapter Card Mfr P/N: USB2-E OWC SKU: STIUSB2EU USB 2.0 Adapter Card for PCI Express Computers. Add 4 External and 1 Internal USB 2.0 Port to your PCI Express System, such as a Mac Pro. 30 Day OWC Fulfilled Limited Warranty
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