Twin25G Blazing Fast 25GbE Networking with Dual SFP28 Sockets with Two 25GBASE-SR TransceiversTwin10G Product Hero Photo
Blazing Fast 25GbE Networking

Twin25G

25 Gigabit Ethernet Thunderbolt Adapter with Two SFP28 Transceivers

compatible with 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.

Twin25G Thunderbolt Adapter is a pre-configured bundle of Sonnet’s Twin25G PCIe Card and Echo Express SEL Thunderbolt Expansion System.

Gradient Fade Into Next ImageTwin25G 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 Icon

Adds High-performance 25GbE Connectivity

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

SFP28 Transceiver Icon

SFP28 Transceivers Included

High-performance adapter includes two 25GBASE SFP28 transceivers.

Easy Setup Icon

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.

40Gpbs Icon

40Gbps Thunderbolt Device

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

Thunderbolt 3 Ports Icon

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.

Rugged Icon

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.

Apple Logo Icon

Mac Compatible

Supports all M series Macs and Intel Macs with Thunderbolt 3 ports.

Windows Logo Icon

Windows Compatible

Supports Windows computers with Thunderbolt 5 or Thunderbolt 4 ports.

Linux Logo Icon

Linux Compatible

Supports Linux computers with Thunderbolt 5 or Thunderbolt 4 ports.

Free lifetime tech support icon.

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.

Twin25G Connected to MacBook Pro
Fan Icon
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.
Top of Networking Globe
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).
Optical Cables Connected to Twin25G
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.
Sonnet Thunderbolt cable and ThunderLok icon.
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.
Thunderbolt port with threaded hole icon.

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.

40Gbps Thunderbolt Ports Icons
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 3.1 Gen 2 Icon
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.
15W Power Icon
Provides 15W of Power
For peripherals requiring power, 15 watts is provided to bus-powered devices.
5K Display Icon
Supports Connecting One Up to 8K Display
Maximize the utilization of one computer Thunderbolt port, connecting the largest display supported by your computer.

Why Choose Sonnet for Ethernet Networking?

We've got what you need for 25GbE, 10GbE, 5GbE, and 2.5GbE connections

  • macOS, Windows, and Linux support
  • 25GbE, 10GbE, 5GbE, and 2.5GbE network experts
  • One provider for all your networking solutions
  • Adapters for Thunderbolt computers
  • Single- and dual-port adapters
  • Copper and optical adapters
  • Networking PCIe cards

Learn More

Why Choose Sonnet for Ethernet Networking?

We've got what you need for all networking connections

  • macOS, Windows, and Linux support
  • 25GbE, 10GbE, 5GbE, and 2.5GbE network experts
  • One provider for all your networking connections
  • Adapters for Thunderbolt computers
  • Single- and dual-port adapters
  • Copper and optical adapters
  • Networking PCIe cards
Product
Supported Speeds
Interfaces
Controller
OS Compatibility
For Computers with Thunderbolt Ports
Sonnet Thunderbolt AVB Adapter Hero Photo
Sonnet Thunderbolt AVB Adapter
Learn More
  • 1Gb
  • RJ45
  • Broadcom
Solo2.5G Adapter Hero Photo
Solo2.5G USB-C to 2.5 Gigabit Ethernet Adapter
Learn More
  • 2.5Gb
  • 1Gb
  • 100 Mb
  • RJ45
  • Realtek
Solo2.5G Adapter Hero Photo
Solo5G USB-C to 5 Gigabit Ethernet Adapter
Learn More
  • 5Gb
  • 2.5Gb
  • 1Gb
  • 100 Mb
  • RJ45
  • Realtek
Solo10G Thunderbolt Adapter Hero Photo
Solo10G Thunderbolt Adapter
Learn More
  • 10Gb
  • 2.5Gb/5Gb
  • 1Gb
  • RJ45
  • Marvell
Solo10G SFP+ Thunderbolt Adapter Hero Photo
Solo10G SFP+ Thunderbolt Adapter
Learn More
  • 10Gb
  • SFP+ socket with SFP+ SR transceiver
  • Marvell
Twin10G Thunderbolt Adapter Hero Photo
Twin10G Thunderbolt Adapter
Learn More
  • 10Gb
  • 1Gb
  • 2x RJ45
  • Intel
Twin10G SFP28 Thunderbolt Adapter Hero Photo
Twin10G SFP28 Thunderbolt Adapter
Learn More
  • 10Gb
  • 2x SFP28 SR transceivers included
  • Mellanox
Twin25 Thunderbolt Adapter Hero Photo
Twin25 Thunderbolt Adapter
Learn More
  • 25Gb
  • 10Gb
  • 2x SFP28 SR transceivers included
  • Mellanox
For Computers or Thunderbolt Expansion Systems with PCIe Slots
Solo2.5G PCIe Card Hero Photo
Solo2.5G PCIe Card
Learn More
  • 2.5/5Gb
  • 1Gb
  • RJ45
  • Realtek
Solo10G PCIe Card Hero Photo
Solo10G PCIe Card
Learn More
  • 10Gb
  • 2.5/5Gb
  • 1Gb
  • RJ45
  • Marvell
Solo10G SFP+ PCIe Card Hero Photo
Solo10G SFP+ PCIe Card
Learn More
  • 10Gb
  • SFP+ socket including SFP+ SR transceiver
  • Marvell
Twin10G 10GBASE-T PCIe Card Hero Photo
Twin10G 10GBASE-T PCIe Card
Learn More
  • 10Gb
  • 1Gb
  • 2x RJ45
  • Intel
Twin10G SFP28 PCIe Card Hero Photo
Twin10G SFP28 PCIe Card
Learn More
  • 10Gb
  • 2x SFP28 SR transceivers included
  • Mellanox
Twin25G PCIe Card Photo
Twin25G PCIe Card
Learn More
  • 25Gb
  • 10Gb
  • 2x SFP28 SR transceivers included
  • Mellanox
McFiver PCIe Card Hero Photo
McFiver PCIe Card
Learn More
  • 10Gb
  • 2.5/5Gb
  • 1Gb
  • RJ45
  • 2x USB-C 3.2 Gen 2
  • 2x M.2 SSD sockets
  • Marvell
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.

Twin25G Thunderbolt Adapter