Sonnet Allegro USB3 4 Port

4-port USB 3.0 adapter for Mac and Windows desktop computers with PCIe slots

Suggested List Price: £53+VAT

Product Code: SON-USB3-4PME

Where to buy

Stock status: In Stock; available from resellers

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Sonnet Allegro USB 3.0 4-Port Advantages Product Overview

Outlines the advantages of Sonnet’s design by adding power switches that that assure the cards work when power fluctuations occur

  • Adds USB Connectivity
    Adds four USB 3.0 ports to your Mac Pro with PCIe slots, Windows PC, or Thunderbolt-to-PCIe card expansion chassis; transfers data up to 10x faster than over USB 2.0 connections. 
  • Super-Powered Ports
    Supports USB 3.0 bus-powered hard drives, SSDs, DVDs & Blu-ray devices with up to 2.0A per port
  • Charging Ports
    Supports USB 3.0 charging port handshake and will simultaneously sync and charge iPads and other devices that support USB 3.0 charging at 1.5A per device
  • Broad USB 3.0 Device Support & Compatibility
    Supports storage, hubs, and other USB-IF compliant USB 3.0 devices; compatible with USB 2.0 devices
  • Supports Hot-Swappable Device Connection
    Plug in and disconnect peripherals without shutting off your computer
  • Optimized for Thunderbolt
    Provides maximum performance over Thunderbolt
  • Easy Installation
    Quick and easy user installation into any available PCIe slot of your computer

Mac Compatibility

  • Mac Pro® (with card slots)
  • OS X® 10.8.5+
  • macOS Sierra compatible

PC Compatibility

  • PC Desktop (with PCIe slots, PCIe 2.0 slots recommended)
  • Windows® 10, 8, 7
  • Windows Server 2016, 2012, 2008

Add Four USB 3.0 Connections to Your Mac Pro® Tower, Windows® PC, or Thunderbolt™-to-PCI Express Card Expansion System

Your computer's USB 2.0 ports are perfectly adequate for connecting mice, keyboards, and printers, but if you need to connect external storage drives, USB 2.0 ports are underpowered in more ways than one—limiting data transfer speeds to around 25–30 MB/s, they can hardly be called “high performance”. Most drives available today include USB 3.0 interfaces and offer significantly better performance than USB 2.0-equipped drives. Though you can connect them to your computer's USB 2.0 ports, their performance would be reduced by as much as 85 percent! Don't settle for slow performance—install a Sonnet Allegro USB 3.0 4-Port card to instantly add four SuperSpeed USB 3.0 ports to your system to take full advantage of today's drives' performance capabilities.

Sonnet specially engineered the Allegro USB 3.0 4-Port card to provide extra power through its ports without the need for you to connect an auxiliary power cable. Delivering up to 10W of power per port, this Sonnet solution supports USB 3.0 bus-powered hard drives, SSDs, DVDs & Blu-ray™ devices without the need to connect an additional AC power adapter. The Allegro USB 3.0 card also supports the USB 3.0 charging specification that enables you to simultaneously charge and sync your iPad®, iPhone®, or other device that supports USB 3.0 charging!

The Allegro USB 3.0 4-Port card features a PCIe 2.0 bus interface to take advantage of your computer's fast expansion card slots. This card installs easily into any PCI Express® (PCIe) slot that supports a full-height card, features hot-pluggable and hot-swappable device connection support with automatic device configuration, and works with all USB-IF compliant USB 3.0 and USB 2.0, peripherals.

Optimized for Thunderbolt

Got a Thunderbolt connection, but no PCIe slot? The Allegro USB 3.0 4-Port card is ideal for use in any Thunderbolt to PCIe card expansion chassis, including one of Sonnet's Echo Express™ or xMac™ Thunderbolt 2-to-PCI Express card expansion systems, offering full performance wherever you install it—now you can add SuperSpeed USB 3.0 charging connections any Mac with a Thunderbolt port.

Download the latest Firmware and Software

When connected to the Allegro Pro USB 3.0 PCIe, Allegro USB 3.0 4-Port PCIe, Tango 3.0 PCIe, or Tempo Duo PCIe card, my bus-powered USB 2.0 or 3.0 drive or SSD will not reliably mount or transfer data.

High power bus-powered drives are supported only by the Allegro Pro USB 3.0 PCIe (USB3-PRO-4PM-E), Allegro USB 3.0 4-Port PCIe (USB3-4PM-E), and Tango 3.0 PCIe (FW8USB3A-E) cards, but not the discontinued USB 3.0 PCIe cards (USB3-E or USB3M-E), the initial version of the Tango 3.0 PCIe card (FWUSB3-E), nor any USB 2.0 cards.

If you are still having trouble, this may be a problem due to a voltage drop in the USB cable. Use the following guide to select the correct cable for your application. 

In general, these cables should work with SSDs or optical drives drawing up to 2A of current:

Type........Power-Carrying Wires....Cable Outside Diameter....Maximum Cable Length

USB 2.0..........28 AWG...............................3.8mm...........................0.15m (0.5 ft)

USB 2.0..........24 AWG...............................4.7mm...........................0.3m ( 1 ft)

USB 2.0..........20 AWG...............................5.0mm..............................1m ( 3 ft)

USB 3.0..........22 AWG...............................6.0mm..............................1m ( 3 ft)

Generally, the gauge of the power-carrying wires can be inferred from the cable outside diameter.

  • Allegro USB 3.0 4-Port PCIe Computer Card
  • Documentation

Sonnet - macOS High Sierra Compatibility Information

Sonnet is currently testing product compatibility for macOS 10.13 (High Sierra).