Flat shipping rate at $9.90 for all orders delivery in Australia.

Sonnet Allegro Pro USB 3.0 PCIe 4-Port



Product Details

Professional 4-port SuperSpeed USB 3.0 charging PCI Express card with dedicated 5 Gb/s controller per port. Supports aggregate transfer speeds of up to 1,800 MB/s (450 MB/s per port). Supports USB 3.0 bus-powered hard drives, SSDs, optical drive devices with up to 2.0A per port; will simultaneously sync and charge iPads and other devices that support USB 3.0 charging at 1.5A per device. Optimized for maximum performance over Thunderbolt.

Specifications and appearance are given as guidelines and may change without notice.

View More

In Depth

Key Features

  • Adds SuperSpeed USB Connectivity—Adds four USB 3.0 ports to your Mac Pro with PCIe slots, Windows PC, or Thunderbolt-to-PCIe card expansion system
  • Four Ports, Four USB 3.0 Controllers—Supports aggregate transfer speeds of up to 1,800 MB/s (450 MB/s per port)
  • Powers Connected Devices—Supports USB 3.0 bus-powered hard drives, SSDs, DVDs & Blu-ray devices with up to 2.0A per port
  • Supports Charge & Sync—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 optimum performance over Thunderbolt
  • Easy Installation—Quick and easy user installation into any available PCIe slot


Part No.  
USB3-PRO-4PM-E Allegro Pro USB 3.0 PCIe
Warranty 5-year
Form Factor PCIe computer card
Bus Interface PCI Express 2.0 x4
Peripherals Supported Industry standard USB 3.0, 2.0, and 1.1 peripherals
Bus Powered Peripherals Supported(1) HDs, SSDs, DVDs, and Blu-ray devices up to 2A per port
Cables Supported(2)
  • USB 3.0 with Standard-A male connector
  • USB 2.0 with Standard-A male connector
Chipset (x4) Fresco Logic
RoHS Compliant Yes
Package Contents
  • Allegro Pro USB 3.0 4-Port PCIe Computer Card
  • Documentation
USB Support  
Number of Ports 4 external
Drives Supported Four (or more with hardware RAID enclosure)(3)
Standard Complies with OHCI (Open Host Controller Interface), EHCI (Enhanced Host Controller Interface), and xHCI (eXtensible Host Controller Interface) standards
UASP USB attached SCSI protocol supported under
OS X 10.8.5+ and Windows 8.1+
USB Charging USB Battery Charging 1.2 Compliant
(up to 7.5W per port)
Data Transfer Rate Up to 450 MB/s per port
Number of Devices Supported Up to 31
Hot Plug Supports hot-pluggable and hot swappable device connection


 Mac Compatibility

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


Windows Compatibility 

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


    Thunderbolt Compatibility


    Technical Notes

    1. See Support Article FAQ 759 for compatible cable types.
    2. USB 3.0 devices require USB 3.0 cables to support USB 3.0 (SuperSpeed) transfer speeds (up to 5 Gb/s). Use of USB 2.0 cables between USB 3.0 devices and Allegro USB 3.0 4-Port is supported, but data transfers are limited to USB 2.0 speeds (up to 480 Mb/s).
    3. Support for up to sixteen drives requires the use of drive enclosures employing a hardware RAID controller (like Sonnet’s Fusion™ QR, Fusion R400 RAID USB 3.0, or Fusion F3).

    Join Our Mailing List