Twin25G

25 Gigabit Ethernet Thunderbolt Adapter with Two SFP28 Transceivers

for Mac, Windows, and Linux

Incredible 25GbE Connectivity Over Thunderbolt

Many post-production shared storage teams and other bandwidth-heavy workflows have outgrown the capabilities of 10 Gigabit Ethernet (10GbE), which no longer delivers the speed and bandwidth needed for optimal performance. Upgrading to 25 Gigabit Ethernet (25GbE) is a smart move — it delivers significantly higher performance and often utilizes the same optical infrastructure as 10GbE. For these demanding environments, Sonnet’s Twin25G™ Thunderbolt Adapter offers a cost-effective and high-performance solution for adding ultra-fast 25GbE fiber optic network connectivity to Apple M series Macs, Intel Macs with Thunderbolt 3 ports, and Windows or Linux PCs with Thunderbolt 5 or Thunderbolt 4 ports.
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Twin25G Thunderbolt Adapter is a pre-configured bundle of Sonnet’s Twin25G PCIe Card and Echo Express SEL Thunderbolt Expansion System.

Twin25G Hero Photo Over 256GbE Networking Globe

Affordable 25GbE Networking

Make the Switch

Post-production workflows’ needs for speed and increased network bandwidth beyond the current 10Gb standard have increased more quickly than the availability of affordable higher speed network components. Recently, extremely affordable 25Gb Ethernet switches have become available, but connecting a computer with Thunderbolt ports, such as a Mac Studio, to a 25GbE infrastructure has remained expensive — until now. Twin25G Thunderbolt Adapter is the most cost-effective and powerfully simple solution for adding incredible 25GbE network connectivity to your computer without PCIe card slots.

Key Features

Adds High-performance 25GbE Connectivity

Simply powerful way to add dual optical 25GbE connections to your computer.

SFP28 Transceivers Included

High-performance adapter includes two 25GBASE SFP28 transceivers.

Backward Compatible

Adapter also supports 10GbE — enables you to integrate with 10GbE infrastructure now and upgrade your switch or shared storage system to 25GbE later.

40Gbps Thunderbolt Device

40Gbps Thunderbolt supports the full bandwidth of one 25GbE port.

Two Thunderbolt Ports

One port connects to computer; second port provides 15W for a Thunderbolt or USB 3 device; or to connect up to an 8K display.

Compact. Nearly Noiseless.

Adapter is small enough to comfortably fit on any desktop, and quiet enough for use in noise-sensitive environments. You’ll hardly notice it’s there.

Computer Compatibility

Compatible with Mac, Windows, and Linux. See Tech Specs for details.

Sonnet Support

Founded in 1986 in Orange County, Southern California — long recognized as a vibrant hub of technology and engineering — Sonnet has been at the forefront of innovation for nearly four decades. We’ve introduced award-winning products that expand performance and connectivity for Mac, Windows, and other industry-standard computers. Many of our team members have been with us for more than 20 years, bringing unmatched expertise across both current and legacy products. Should you ever need technical support, you can count on our knowledgeable staff to provide the help you need.

Compact and Nearly Noiseless

Cool Running

Small enough to easily fit in most workspaces, Twin25G is still large enough to support proper airflow inside its case to enable the adapter’s temperature-controlled, variable-speed fan to keep the adapter always running cool and quiet.

Networking Globe with Twin25G, SFP28 Transceivers, and Thunderbolt Cable

Everything You Need to Connect Is Included

Simply connect the Twin25G Thunderbolt Adapter to your computer via the included 40Gbps Thunderbolt cable, install a driver, install the included SFP28 modules, connect the adapter to the network switch or directly to 25GbE-enabled storage, and then configure the adapter’s settings through the macOS Network control panel, Windows Device Manager, or Linux command line (or graphical utility).

Intelligent Operation

Efficient Performance

Twin25G attains high throughput performance with minimal host CPU load. The adapter’s smart controller has its own internal processing system with onboard memory to process TX/RX data while using few CPU resources. Once data appears in queues, TX checksums are computed on the fly as data is transmitted; RX checksums are quickly verified, and data is immediately passed directly to main memory. This independent controller action minimizes latency and avoids packet drops. The CPU is freed for other tasks.

Secure Connections for High Performance

Thunderbolt Cable and ThunderLok Included

Sonnet includes a Thunderbolt cable that supports Thunderbolt’s maximum bandwidth and is fully compatible with Thunderbolt 5, 4, and 3 computers. Sonnet also provides ThunderLok, a Thunderbolt connector cable lock, that prevents accidental cable disconnections.

Sonnet Thunderbolt cable with ThunderLok sitting beside it.

ThunderLok Advantage

Many Sonnet Thunderbolt products featuring Thunderbolt ports come equipped with threaded mounting holes to securely attach a Sonnet ThunderLok connector lock, preventing Thunderbolt cables from accidentally disconnecting.

Thunderbolt Technology

Fastest External Interface Available

Sonnet Thunderbolt products feature a high-speed Thunderbolt interface that delivers PCIe bandwidth needed to support data transfers at full speed.

Dual 40Gbps Thunderbolt Ports

One port is reserved for the connection to your Thunderbolt 5 or Thunderbolt 4 computer; the second port provides 15W for a Thunderbolt or USB 3 device; or to connect up to an 8K display.

10Gbps USB 3.2 Gen 2 Support

10Gbps USB 3.2 Gen 2 support allows you to connect a USB device to the second Thunderbolt port.

Provides 15W of Power

For peripherals requiring power, 15 watts is provided to bus-powered devices.

Supports Connecting One Up to 8K Display

Maximize the utilization of one computer Thunderbolt port, connecting the largest display supported by your computer.

See Tech Specs for footnotes.
Product specifications and information subject to change without notice. Computers and accessories that may be featured in photos are not included with the product.