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the fastest USB 3.2 SSDs
SOLO2.5G PCIe Card
Connect and Power
the fastest USB 3.2 SSDs
Allegro Max
1-Port USB-C 20Gbps (USB 3.2 Gen 2x2) PCIe Card
Compatible with
Mac® | Windows® | Linux®
(see Tech Specs for full compatibility details)
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Computer Setup with External USB-C SSD Drive
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 Card installed 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®!
USB-C 20Gbps Performance Graph
video shuttle drive.
mass photo storage.
portable gaming.
Video Editor. Photographer. Gamer.
The Sonnet Advantage
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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 Required Icon
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 Icon
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.

Transfer Files at Up to 2000 MB/s!

Key Features

Transfer Speed Arrows Icon

Transfer Files at Up to 2000 MB/s

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

Custom Connector

Plug In Without Interference

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

Protected Shield Icon

Protects Your Computer

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

Easy Installation Icon

Easy Installation

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

Convenient Operation Icon

Convenient Operation

Plug in and disconnect peripherals without shutting off your computer.

Mac, Windows, and Linux Icon

Mac, Windows, and Linux Compatible

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

Free Lifetime Tech Support
Allegro Max USB-C 20Gbps 1-Port PCIe Card Installed Into a PCIe Slot
Easy Installation. Simple Operation.
There’s no software for you to install — just insert Allegro Max USB-C 20Gbps 1-Port PCIe Card into a x4 PCIe slot (both low-profile and full-height mounting brackets are included) — and then turn on your computer for an instant upgrade.

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.
Allegro Max USB-C 20Gbps 1-Port PCIe Card Photo Shown with Full-height and Low-profile Brackets
Allegro Max USB-C Custom Connector Close Up Photo
Easy to Access Port
Sonnet designed Allegro Max card with a custom USB-C connector that locates the port near the center of the PCIe bracket. Unlike other cards that use standard Type-C connectors that are mounted close to the edge of the bracket, this Allegro card provides plenty of clearance for you to plug in and fully seat cables.

Allegro Max USB-C 20Gbps 1-Port PCIe Card