SONNET 

SONNET USB3C-1M20G-E USB-C 20GBPS 1-PORT PCIE CARD ALLEGRO USBC 20GBPS 1PORT PCIE CARD

Mfg Part Number:  USB3C-1M20G-E  
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Price: $61.62
Quantity:
In Stock/Mfg Direct Ship
Last Updated: Jan 30, 2026
No Sales Tax except these states
, PO and Wire.

Transfer Files From 20Gbps USB-C SSDs at Maximum Speed

Your computer's USB ports are perfectly adequate...for connecting peripherals that don't depend on the ultimate USB 3.2 speeds. Onboard USB ports can be underachievers - at 5Gbps or 10Gbps, they can't support the maximum performance of USB 3.2 Gen 2x2 storage devices - up to 2000 MB/s - and may not provide enough power to enable them to operate. With Sonnet Allegro™ Max USB-C 20Gbps 1-Port PCIe Cardinstalled into a PCIe®card slot of your Mac Pro®(requires macOS®Sonoma 14.4 or later), Windows or Linux computer, you can upgrade to the benefits of SuperSpeed 20Gbps USB-C®

  • video shuttle drive.
  • mass photo storage.
  • portable gaming.

The Sonnet Advantage | Full Power

Sonnet engineered the Allegro Max card to provide 15W of power through its USB-C port. The port communicates to 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.

No Auxiliary Power Connection Required

Ordinary USB-C adapter cards handle power delivered through their ports as an afterthought, requiring the user to connect a separate power connector. Allegro Max USB-C 20Gbps 1-Port PCIe Card is no ordinary adapter card. The Sonnet card draws its power completely through its slot, thus enabling full compatibility in any computer system that doesn't have these power connectors available.

Resettable Fuse

The Allegro Max card features a resettable fuse to protect the card and your computer in case there is a cable or peripheral short circuit. Should the fuse trip on the Sonnet card, you can reset it simply by shutting down the computer.

Key Features | Transfer Files at Up to 2000 MB/s

Supports file transfers from USB 3.2 Gen 2x2 storage devices at maximum speed.

Plug In Without Interference

Custom connector raised toward center of bracket prevents connector interference with PCIe slot separator.

Protects Your Computer

Resettable device overcurrent fuse protects your computer and the card itself should a cable or peripheral short circuit.

Easy Installation

Quick and easy installation into an available PCIe card slot, plus no driver installation required.

Convenient Operation

Plug in and disconnect peripherals without shutting off your computer.

Mac, Windows, and Linux Compatible

Compatible with your Mac Pro (requires macOS Sonoma 14.4 or later), Windows, or Linux computer.

Sonnet Support

Founded in 1986 in Orange County, Southern California - the vibrant hub of technology and engineering south of Silicon Valley - Sonnet has been at the forefront of innovation. Over the years, we've developed numerous award-winning products that enhance performance and connectivity for Mac, Windows, and other industry-standard computers. Many of our team members have been with us for over two decades, providing us with extensive expertise about our current and past offerings. If you ever need technical support for any of our products, don't hesitate to reach out; we're here to assist you.

Main Specification
General Information
Manufacturer Sonnet Technologies, Inc
Manufacturer Part Number USB3C-1M20G-E
Manufacturer Website Address http://www.sonnettech.com
Brand Name Sonnet
Product Line Allegro Max
Product Name Allegro Max USB-C 20Gbps 1-Port PCIe Card
Product Type USB Adapter
Technical Information
Host Interface PCI Express 3.1 x4
Features Thunderbolt 4 Compatible
Features Thunderbolt 3 Compatible
RAID Supported Yes
Media & Performance
Data Transfer Rate 640 MB/s
Data Transfer Rate 1.25 GB/s
Data Transfer Rate 2.50 GB/s
UASP Support Yes
Interfaces/Ports
USB Version 3.2 Gen 2
Total Number of USB Ports 1
USB Connector Type Type-C
Software
Operating System Supported macOS Sequoia
Operating System Supported macOS 14.4 Sonoma
Operating System Supported Linux
Operating System Supported Windows 11
Operating System Supported Windows 10
Physical Characteristics
Form Factor Plug-in Card
Miscellaneous
Package Contents
  • Allegro Max USB-C 20Gbps 1-Port PCIe Card
  • 2 x PCIe Mounting Brackets (full-height and low-profile)
Brand Compatibility Apple
Application/Usage Solid State Drive
Application/Usage Hard Drive
Application/Usage Desktop
Application/Usage Notebook
Platform Supported PC
Platform Supported Mac
Environmental Compliance Restriction of Hazardous Substances (RoHS) 3
Environmental Compliance Waste Electrical and Electronic Equipment Directive (WEEE)
Warranty
Limited Warranty 2 Year
WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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