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Review Summary
Low-profile x4 PCIe card
Mac:
Mac Pro 14,8 (2023)
Mac Pro 7,1 (2019)
macOS 14+
macOS Tahoe compatible
Windows:
Windows computer with an available x4 PCIe slot
Windows 11 and 10
Linux:
Linux computer with an available x4 PCIe slot
Linux Kernel 5.4+
PCI Express 3.1 x4
1x USB-C port
Industry standard USB 3.2 Gen 1, Gen 2 and 2x2, USB 3.1 Gen 1 and 2, USB 3.0, and 2.0
Thunderbolt-only peripherals are not supported
HD, SSD, and SSD RAID
USB-C 20Gbps
USB4
Thunderbolt 4 (< 3.28' (1m))
Thunderbolt 3 (< 3.28' (1m))
ASMedia 3242
Complies with OHCI (Open Host Controller Interface), EHCI (Enhanced Host Controller Interface), and xHCI (extensible Host Controller Interface) standards
USB attached SCSI protocol supported under macOS, Windows 11 and 10
Supports hot-pluggable and hot swappable device connection
32 Degree F to 95 Degree F (0 Degree C to 35 Degree C)
RoHS 3 (Directive 2015/863)
IEC62368-1 and IEC62368-2 Safety
Malaysia
732311013829
Connect and Power the fastest USB 3.2 SSDs
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!
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.
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.
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.