• Overview
  • Tech Specs

All the Right Connections

Does your computer lack the FireWire 400 (1394a) ports needed to connect your external hard drives, DV camcorder, external DVD or Blu-ray burner? Don't worry about not having the right connections or not enough of them—bring your system up to speed with Sonnet's Allegro™ FW400 PCI adapter card. This low-cost solution instantly adds the ports you need to connect all your FireWire 400 peripherals.

Does your computer already have a couple of FireWire ports? Don't clutter your desk by adding a FireWire hub—install the Allegro FW400 card instead. The Allegro FW400 card adds three FireWire ports (three external, or two external plus one internal) to your computer. The Allegro FW400 installs easily into one of your computer’s PCI slots, features hot-pluggable and hot-swappable device connection support with automatic device configuration, and supports all industry-standard FireWire 400 peripherals. This card also powers bus-powered devices (such as small external drives and audio interfaces), so some devices can be plugged in and operate without an extra connection to a power supply.

From importing and editing video files to backing up your computer, Allegro FW400 offers exceptional speed for digital-intensive work. Spend less time on slower USB 2.0 transfer speeds and more time on being productive. Expand your computer and your possibilities all at the same time!


Key Features

Simple way to add three FireWire 400 ports to any compatible computer

Easy installation—plug and play(1)

Provides fast interface to import videos from your digital camcorder, transfer files to external drives, and more

Supports hot-swappable device connection—plug in and disconnect peripherals without shutting off your computer


Diagram of Allegro FW400's FireWire ports

Allegro FW400 easily adds 3 FireWire ports to your Mac or PC. Simpy plug the card into an available PCI or PCI-X slot and instantly get 3 external (or 2 external + 1 internal) FireWire ports.


See Tech Specs Tab for footnotes
Part No.  
FW400A Discontinued
Warranty 1-year
Form Factor PCI computer card
Bus Interface PCI
Number of Ports 3 (3 external or 2 external + 1 internal)
RoHS Compliant Yes
Package Contents
  • Allegro FW400 PCI Computer Card
  • Documentation
FireWire Support  
Standard IEEE 1394a compliant
Cables Supported 6-pin male FireWire 400 cables
Peripherals Supported Supports all industry standard FireWire 400 peripherals
Data Transfer Rate 400/200/100 Mbits/s
Number of Devices Supported Up to 63 (data only)
Hot Plug Supports hot-pluggable and hot swappable device connection
Target Disk Mode Supported
Chipset NEC


Specifications subject to change without notice.





Mac Compatibility

Power Mac® G5 (with PCI or PCI-X slots)(2)

Power Mac G4 (with PCI slots)

Power Mac G3 (Blue & White)(3)

OS X® 10.3-10.5

Mac® OS 9

PC Compatibility(1)

PC desktop (with PCI or PCI-X slots)

Windows® 8, 7, Vista®, XP (SP2)

Technical Notes

  1. Requires driver software when installed in Windows PCs.
  2. The earlier version of the Allegro FW400 (Part No. FW400) is not compatible with the Power Mac G5.
  3. OS X 10.4 supported on early Power Mac G3 computers when used with appropriate third-party software. Please refer to software developer's website for complete compatibility and specification details. Sonnet does not endorse nor offer support for third-party software. For support issues, please refer software developer's support site.


Mac OS logoWindows logo FireWire logo RoHS Compliant logo