eGFX Breakaway Box 550W


Amazing Graphics Acceleration

Thunderbolt 3 to eGPU Card Expansion System

Create Your Own Personal eGPU Workstation with a High-performance Video Card


Amazing Graphics Acceleration

Thunderbolt 3 to eGPU Card Expansion System

Create Your Own Personal eGPU Workstation with a High-performance Video Card

Turn Your Computer with Thunderbolt 3 into a Graphics Workstation

From editing to rendering to color grading, and from animation to special effects, many pro applications rely on desktop and workstation graphics (GPU) cards to do the heavy lifting in processing data. Unfortunately, many popular computers are equipped only with integrated graphics or low-power discrete GPUs that can cause performance bottlenecks when performing these tasks. Happily, there’s a simple solution to greater performance—add a Sonnet external GPU (eGPU). The eGFX Breakaway™ Box Thunderbolt™ 3 to GPU PCIe card expansion systems boost your eGFX-compatible computer’s graphics performance by connecting a high-performance GPU card via a single cable.

Break Into – External GPU Performance

Sonnet’s eGFX Breakaway™ Box is an award-winning family of Thunderbolt™ 3 external GPU enclosures that support any Thunderbolt compatible PCIe card, but is designed specifically for bandwidth-intensive graphic video cards.

Broad GPU Card Compatibility

eGFX Breakaway Box systems are designed specifically to accommodate up to the largest and most power-hungry GPU cards. With two models to choose from, the Breakaway Box line supports all Thunderbolt-compatible cards(1) with popular GPU chipsets—such as AMD Radeon RX series (including VEGA GPUs); and NVIDIA® GeForce® series, and TITAN GPUs. Even the latest pro cards—AMD Radeon Pro and NVIDIA Quadro® GPUs—are supported! (Note that macOS® supports only AMD GPU cards in eGPU systems, while Windows® supports AMD and NVIDIA cards.) With a GPU card installed, the Breakaway Box functions as a simple plug-in upgrade to significantly accelerate the demanding needs of your video production workflow.

Key Features
Boost Graphics Performance IconBoosts Graphics Performance

Connects a high-performance GPU card to your computer with Thunderbolt 3 ports.

Cut Applications In Half Icon Cuts Application Task Times

Enables GPU acceleration to significantly improve editing, rendering, color grading, animation, and special effects performance.

Supports Latest eGPU Cards IconSupports the Latest GPU Cards

Includes AMD Radeon VII, RX, RX Vega, Pro and Pro W/WX models; and NVIDIA GeForce GTX 10 and RTX 20 series, TITAN, and Quadro models.

Multi-eGPU Acceleration Icon Multi-eGPU Acceleration Support

Connect two, three, or four eGFX Breakaway Boxes to slash task times on supported applications.

Supports Non-GPU Cards IconSupports Non-GPU PCIe Cards

Supports Thunderbolt-compatible full-length, full-height, single- or double-width cards –perfect for pro audio I/O and DSP cards and pro video I/O and transcoding cards.

40Gpbs Icon Single-Port 40Gbps Thunderbolt 3 Interface

Ensures full 2750 MB/s of PCIe bandwidth(2) is dedicated to the installed card.

Quietest Configurable eGFX System IconQuietest Configurable eGFX System Available

Large built-in, variable-speed, temperature-controlled fan quietly and effectively cools whatever card you install.

Choice of Models Icon Choice of Models

Choose the one that meets the power requirements of the card you’ll install, and Power Delivery capability you need to charge your computer.

Thunderbolt Certified & Apple Recommended IconThunderbolt Certified and Apple Recommended

Certified for Thunderbolt and recommended by Apple for use with Mac® computers.


Multi-GPU Support

4K to 8K Workflows –
Connect Two or More Breakaway Boxes

Many task times on supported applications—such as Adobe® Premiere® Pro, DaVinci Resolve™, and Maxon Cinema 4D™, to name a few—can be cut significantly with one eGFX Breakaway Box connected. For computers with multiple Thunderbolt 3 ports, times can be slashed when two, three, or four Breakaway Boxes are employed. Connecting one or more eGPUs can multiply your computer’s graphics processing power, enabling it to handle 4K, 5K, 6K, and 8K workflows more efficiently. Plus, the onboard (discrete) GPU also contributes to the aggregate performance.

Purpose Built – Full-length PCIe Card Support

An eGFX Breakaway Box’s single x16 PCIe 3.0 slot accommodates full-length cards. High-output power supplies support trouble free operation. The Breakaway Box’s single-port 40Gbps Thunderbolt 3 interface ensures the full 2750 MB/s of PCIe bandwidth(2) is dedicated to the installed card.

Coolest and Quietest External GPU Card Box on the Market

The Sonnet eGFX Breakaway Box is the coolest and quietest add-your-own-card eGPU on the market—with its large variable-speed temperature-controlled fan that quietly and effectively cools the installed card, the Breakaway Box can be comfortably used in noise-sensitive working environments.

Liquid Coolers Supported

Looking for an even quieter experience? The eGFX Breakaway Box supports 120mm x 1, single-fan radiators (sold separately). Water block coolers run quieter than active fans, plus, water block coolers enable higher overclocking—simply replace the system fan with the radiator/fan assembly and install the card as usual.
sold separately

Graphic-Intensive Gaming Support

There’s no need for you to carry a heavy and expensive gaming laptop to have a great gaming experience—just plug in a Breakaway Box and add the GPU power you want when you need it! A Breakaway Box is ideal for empowering graphic-intensive gaming on a MacBook Air®, Ultrabook™ and other thin/light notebook computers that otherwise would deliver a poor gaming experience. Accelerated graphics can either be displayed on your notebook’s own display panel or on one, two, or more external monitors. And, unlike with gaming laptops, you can upgrade the GPU card in the Box to keep up with the latest in GPU technology.

Additional information

Weight 3200 g
Dimensions 18.5 × 34.0 × 20.2 cm
Form Factor


Internal Connectors

External Connectors

1x Thunderbolt 3
1x Power (C14-type)

Expansion Slot

One x16 mechanical (x4 electrical, Thunderbolt 3 spec) PCIe 3.0

PCIe Card Supported

One full-length, full-height, double-width PCIe card

Liquid Cooling Support

Supports 120mm x 1 water block coolers

In The Box

eGFX Breakaway Box 550W enclosure
Power cord
0.5-meter Thunderbolt 3 (40Gbps) cable


Mac Compatibility
macOS Big Sur compatible
Mac with Thunderbolt 3 ports and macOS 10.13.6+

Automatically accelerates AMD RX eGPU connected monitors, and games and select apps run on those monitors(3)
macOS drivers for NVIDIA GPU cards are not compatible with Thunderbolt Technology
One eGFX Breakaway Box eGPU (WX 9100, for example) supports up to six external 4k monitors @60Hz
Mac with Thunderbolt 3 ports and macOS 10.14.6+ (Mac mini see Tech Note 10 below)
Additional Features:

Support added for AMD RX 560 and RX 590 AMD GPUs
Windows 10 support under Parallels Desktop for Mac(4)
Support for two eGFX Breakaway Box eGPUs and up to twelve external 4k monitors @60Hz

Mac with Thunderbolt 3 ports and macOS 10.15.7+
Additional Features:

Support added for AMD RX 5500, 5500 XT, 5600, 5600 XT, 5700, 5700 XT

Apple M1 Macs do not yet support eGPUs
Supports VIVE and VIVE Pro with AMD Radeon RX 480 or better(5)
External GPUs not supported by Thunderbolt 2 or Thunderbolt equipped Macs(6)
External GPUs not supported on Windows 10 under Boot Camp
Certified with all generation Thunderbolt Macs to support Thunderbolt-compatible non-GPU cards, such as AVID HDX(7) and RED ROCKET-X

Windows Compatibility

Windows PC with a Thunderbolt 3 port
GPU card use requires an eGFX-enabled Windows PC
Windows 10 (64-bit Edition, Version 1809 or greater)
Supports VIVE and VIVE Pro with NVIDIA GTX 1060 or AMD Radeon RX 480 or better

Monitor Compatibility

1080P monitors using DP or HDMI ports

4K and 5K monitors using DP or HDMI ports

4K, 5K, and 6K Thunderbolt 3 monitors require a GPU card with USB-C output(11)

LG UltraFine 4K and 5K displays
Apple Pro Display XDR 6K

49” 5120×1440 Dual QHD monitors using a DP port:

Dell Ultrasharp 49 Curved Monitor U4919DW
LG 49 inch 32:9 UltraWide Dual QHD IPS Curved LED Monitor 49WL95C-W
Philips Brilliance 32:9 Superwide Curved LCD Display 499P9H/27
Samsung 49” CRG9 Dual QHD Curved QLED Gaming Monitor LC49RG90SSNXZA

8K displays are compatible with Windows, but not currently compatible with macOS


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