• Australian Business Owned and Operated
Allegro USB-C 2-Port PCIe Card
Special Order
  • SKU: USB3C-2PM-E

Sonnet Allegro USB-C 2-Port PCIe Card

  • Vendor: Sonnet
  • Product Type: Accessories

Special Order Item - Lead time of 3 weeks from order

When it comes to supporting the fastest USB drives available, your computer’s USB 3.0 ports are perfectly adequate for connecting peripherals that don’t depend on the ultimate USB 3.1 speeds. However, common USB 3.0 ports can be underachievers—at 5Gbps, they can’t support the maximum performance from many storage devices, and may not provide enough power to enable them to operate. You need SuperSpeed+ USB. You need Sonnet’s Allegro USB-C PCIe card.

The Allegro™ USB-C PCIe supports data transfers at up to twice as fast as USB 3.0, and can also deliver 15W of power per port to USB-C bus-powered devices (three times the 4.5W specified in the USB 3.0 spec). Don’t settle for mediocre performance or insufficient power for the fastest SSDs—install an Allegro USB-C card to instantly add two Gen 2 USB 3.1 ports to your system and take full advantage of today’s SSD performance.

Speed and Power

Sonnet's Allegro USB-C PCIe computer card supports data transfers up to 960 MB/s when connected to a USB-C Gen 2 SSD RAID device—transfers complete in half the time compared with using a USB 3.0 2.5-inch SSD! Sonnet specially engineered the Allegro USB-C card to provide 15W of power through each of its ports. The ports communicate with the host that 3A of VBUS current is available, enabling this Sonnet solution to support USB-C bus-powered SSDs and SSD RAID devices that need 15W during demanding write operations.

Regulates Power to Each Port

Ordinary USB-C adapter cards deal with power delivered through the ports as an afterthought, requiring an additional power source for the card and providing little regulation. The Allegro USB-C PCIe is no ordinary adapter card. The Allegro card regulates its own power without requiring a back-of-the card power cable connection, thus enabling full compatibility in any computer or Thunderbolt expansion chassis that doesn’t have these power connectors available.

Sonnet’s Allegro USB-C is unique in regulating power to each port independently, giving each one protection from power glitches on the adjacent port. Without this protection (such as found on an ordinary card), connects and disconnects of one device may cause auto-disconnects of the other.

Resettable Fuses

The Allegro USB-C card features a resettable fuse on each port to protect the card and computer should there be a cable or peripheral failure. Should a fuse trip on the Sonnet card, you can reset it simply by shutting down the computer.

PCIe Auto-Negotiation

Sonnet's Allegro USB-C PCIe features PCI Express auto-negotiation. The card automatically negotiates to a x1 data link in a PCIe 3.0 slot, and to a x2 link in a PCIe 2.0 slot, giving full bandwidth to both generations of PCIe slots, ensuring great performance in any configuration.

Optimised for Thunderbolt

Got a Thunderbolt connection, but no PCIe slot? The Allegro USB-C PCIe card is ideal for use in any Thunderbolt 2 or Thunderbolt 3 to PCIe card expansion chassis, including Sonnet’s Echo Express™ or xMac™ Thunderbolt to PCI Express card expansion systems, offering full performance wherever you install it—now you can add dual USB-C ports in any current Sonnet Thunderbolt chassis.

Easy Installation

This Allegro USB-C PCIe card installs easily into any PCIe x4 (mechanical) slot; both low-profile and full-height mounting brackets are included. The Sonnet card features hot-pluggable and hot-swappable device connection support with automatic device configuration, and works with all USB-IF compliant USB peripherals.

For more information head over to the Sonnet website.

Warranty 2-year
Form Factor PCIe x4 low-profile computer card; full-height mounting bracket attached, low-profile bracket included
Bus Interface PCI Express 2.0 x2, or 3.0 x1 auto-negotiate
Peripherals Supported Industry standard USB 3.1 Gen 2, 3.0, 2.0, and 1.1
Not compatible with Thunderbolt 3 peripherals
Bus Powered Peripherals Supported HD, SSD, SSD RAID, DVD & Blu-ray devices
3A per port advertised using USB-C CC (Channel Configuration)
Up to 15W per port for operation or charging
Cables Supported USB-C 10Gbps
USB-C 5Gbps
Thunderbolt 3 40Gbps (0.5-meter only)
Thunderbolt 3 20Gbps
Chipset ASMedia 1142
RoHS Compliant Yes
Package Contents Allegro USB-C PCIe Adapter Card with attached full-height mounting bracket
Low-profile mounting bracket
USB Support
Number of Ports 2 external
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 undermacOS 10.10 & 10.12+, Windows 10
Chipset Throughput 10 Gbps combined port throughput
Number of Devices Supported Up to 31
Hot Plug Supports hot-pluggable and hot swappable device connection
Boot Support No computers support booting at this time
Mac Compatibility Mac Pro® (3,1,,4,1,,5,1, or 7,1 [2019])(compatible with Mac Pro 3,1 PCIe 1.1 slot)
macOS 10.10.5, 10.12.6+(not compatible with macOS 10.11)
macOS Mojave compatible
Windows Compatibility Computer with PCIe slots
Windows 10, 8.1, 7
Windows Server 2016, 2012, 2008 (64-bit editions)
Linux Compatibility Computer with PCIe slotsLinux 4.12+
Kernel (LTS version only)
Thunderbolt Compatibility Supports USB 3 peripherals on a Mac or Windows PC when installed in a Thunderbolt 2 or Thunderbolt 3 PCIe expansion system
macOS 10.12.6+
Windows 10 Build 1703 or newer (64-bit edition)
Specifications correct at time of publication