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USB-A 10 Gbps • Dual Controllers for Fast Drive-to-Drive Transfers
USB Charge & Sync • Four Ports with up to 7.5W Power per Port
Add Four USB-A 10 Gbps Ports
USB-A PCIe Card (10 Gbps USB 3.2 Gen 2) for Mac, Windows, and Linux
The fastest SSD-based USB 3.2 Gen 2 drives now available can transfer data at 800 MB/s — many are bus-powered, too. But, most desktop computers (including many new models) feature old-generation USB interfaces that can’t support that performance, and may not provide enough power to enable those bus-powered drives to function. Break through the bottleneck — install Sonnet’s Allegro Pro Type-A USB 3.2 PCIe(1) to instantly add four USB-A 10 Gbps ports to your system.
Two Gen 2 Controllers, Four USB-A Ports
Featuring two 10 Gbps USB 3.2 Gen 2 controllers and four USB-A ports, the Allegro PCIe card supports the fastest USB drives available, yet provides the most common connection type for peripheral devices.
The Speed and Power
Connected to a single USB 3.2 Gen 2 SSD RAID device, Sonnet’s Allegro PCIe card supports data transfers up to 800 MB/s—transfers complete in half the time(2) compared with using a USB 3.1 Gen 1 or USB 3.0 adapter card. Made possible through the use of dual controllers, with two connected drives, each port supports simultaneous 660 MB/s transfers. With four drives connected, each port supports simultaneous 300 MB/s transfers!
Sonnet Port Power Advantages:
Unlike ordinary USB adapter cards, Sonnet's Allegro PCIe card was designed with a focus on intelligent power management and delivery for powering attached drives through its ports.
No Auxiliary Power Needed
Ordinary USB-A cards require the connection of a separate power connector. The Allegro draws the power it needs from the slot it’s installed in to power connected drives, enabling you to install the card in any compatible computer or Thunderbolt expansion system that doesn’t have these power connectors available.
Independent Power Regulation for
Each Port
Ordinary USB-A cards can provide poor power regulation through their ports. The Allegro PCIe card protects each port from power glitches on adjacent ports — such as when a hard drive spins up after connection — preventing auto-disconnects of already-connected drives.
Resettable Fuses
Unlike ordinary USB-A cards, the Allegro features a resettable fuse on each port to protect the card and your computer should a cable or peripheral fail. Resetting a tripped fuse is simple — just shut down and restart your computer.
Add USB 3.2 to Your Thunderbolt Mac
Got a Mac with a Thunderbolt connection, but no PCIe slot? The Allegro is ideal for use in a Sonnet Thunderbolt expansion system.
Perfect for the Extra Slot in Your Multi-Slot Thunderbolt System
Have a multi-slot Thunderbolt expansion system with an open slot? Installing an Allegro Pro Type-A USB 3.2 PCIe card is an excellent way to inexpensively add four SuperSpeed USB-A 10 Gbps ports to your computer.
Easy Installation, Broad Device Support
The full-height Allegro PCIe card installs easily into any PCIe x4 (mechanical) or larger slot. 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.
| Part Number | USB3-PRO-4P10-E – Allegro Pro Type-A USB 3.2 PCIe | Warranty | 2 Years |
| Form Factor | Full-height, half-length PCIe card | Bus Interface | PCI Express 2.0 x4 |
| Peripherals Supported | Industry standard USB 3 and USB 2 | Bus Powered Peripherals Supported | 1.5A per port advertised using USB-A Charging; 7.5W per port for operation or charging |
| Cables Supported | USB-A (10 Gbps) cable | Chipset | 2x ASMedia 3142 |
| USB Standards | 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 |
| Chipset Throughput | 20 Gbps combined port throughput | Number of Devices Supported | Up to 62 |
| Hot Plug | Supports hot-pluggable and hot-swappable device connections | Boot Support | Not supported |
| Mac Compatibility | Mac Pro 14,8 (2023); Mac Pro 7,1 (2019); macOS 15+; compatible with macOS 27 | Windows Compatibility | Windows computer with an available x4 or larger PCIe slot; Windows 11 25H2+; Windows Server 2025 |
| Linux Compatibility (Tech Note 1149) | Linux computer with an available x4 or larger PCIe slot; supported Linux kernel 6.6 or later | Thunderbolt Compatibility | Thunderbolt expansion system with an available x4 or larger PCIe slot |
| Package Contents | Allegro Pro Type-A USB 3.2 PCIe Card; Documentation |
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