eGPU Breakaway Box 750W


Amazing Graphics Acceleration

Thunderbolt 3 to eGPU Card Expansion System

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


Pro Power Graphics
Add a High-performance Video Card to Create Your Own Personal eGPU Workstation

Thunderbolt 3 to eGPU Card Expansion Systems

Transform Your Thunderbolt Computer Into a Graphics Workstation

Whether you’re editing, rendering, color grading, animating or creating special effects, many of the pro applications you use 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 bottleneck performance when performing these tasks. Happily, there’s a simple path to greater productivity—add a Sonnet external GPU (eGPU). The eGPU Breakaway™ Box 750 and 750ex Thunderbolt™ 3 to GPU PCIe card expansion systems boost your eGPU-compatible computer’s graphics performance by connecting a high-performance GPU card to your computer via a single cable.

Future-proof Upgrade

With each new generation of GPU cards, users can look forward to a step (or leap) forward in performance. Less predictable is how much power they will require to operate—better performance frequently requires increased power. For eGPU users, power consumption can be a concern. Don’t limit your future video graphics card choices—choose a Sonnet eGPU Breakaway Box 750 or 750ex. Equipped with 750W power supplies, these Sonnet chassis easily support the highest power demands of latest GPUs and have plenty of extra power to support GPU cards from generations to come.

eGPU Breakaway Box 750

  • Includes two 8-pin (6+2 pin) auxiliary power connectors
  • 750W power supply; supports cards requiring up to 375W of continuous power plus an additional 100W peak power
  • Provides 100W of upstream power (useful for charging your notebook)
  • AMD approved for the air-cooled editions of the AMD Radeon RX Vega 64, Radeon Pro WX 8200, and WX 9100
  • Designed to also support overclocked NVIDIA cards with high peak power requirements
  • See the list of Supported GPU Cards (PDF)

Expansive GPU Card Compatibility

No Compromise GPU Card Choice

eGPU Breakaway Box 750 systems are designed specifically to accommodate the most power-hungry double-width GPU cards. They support 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, a 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 Icon Boosts 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.

750W Power Supply Icon 750W Power Supply

Support the power requirements of the latest compatible GPU cards; future-proof design handles higher power requirements of cards to come.

Supports Latest eGPU Cards Icon Supports Many of the Latest GPU Cards

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

Multi-eGPU Acceleration Icon Multi-eGPU Acceleration Support

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

Supports Non-GPU Cards Icon Supports 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.

Quietest Configurable eGPU System Icon Quietest Configurable eGPU 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

Both models support the same GPU cards, include the same power supply, and provide the same portable computer charging support; the 750ex adds additional connectivity.

Additional Connectivity Icon 750ex Model: Additional Connectivity

Adds four 5Gb/s USB Type A ports to connect peripherals, plus an RJ45 Gigabit Ethernet port for a wired network connectivity.

40Gpbs Icon Single-Port 40Gbps Thunderbolt 3 Interface

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

Thunderbolt Certified Icon Thunderbolt Certified

Certified for Thunderbolt for use with Mac® computers.

Mac & Windows Icon Mac and Windows Compatible

Compatible with Mac and Windows computers with Thunderbolt 3 ports.

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 eGPU Breakaway Box connected. But, for computers with multiple Thunderbolt 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, a computer’s onboard discrete GPU also contributes to the aggregate performance.

Designed for GPU Cards, Also Supports Other Demanding PCIe Cards

The Breakaway Box’s single x16 PCIe 3.0 slot accommodates full-length, double-width cards, and its 750W power supply supports trouble-free operation. Its single-port 40Gbps Thunderbolt 3 interface ensures the full 2750 MB/s of PCIe bandwidth(2) is dedicated to the installed card.
Supports Latest eGPU Cards
designed to house and power the latest power-hungry video cards

Coolest & Quietest Add-your-own-card eGPU System Available

With its large variable-speed temperature-controlled fan that quietly and effectively cools the installed card, the eGPU Breakaway Box can be comfortably used in noise-sensitive working environments.

Graphic-Intensive Gaming Support

There’s no need for you to carry a heavy, loud, and hot-running 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 an Intel® processor-based MacBook Air® or 13-inch MacBook Pro®, Ultrabook™ and other thin/light notebook computers that otherwise would deliver a poor gaming experience. Accelerated graphics can either be displayed on one, two, or more external monitors, or on your notebook’s own display panel. Best of all, you can upgrade the GPU card in the Box to keep up with the latest in GPU technology (unlike with gaming laptops).

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

eGPU Breakaway Box 750W enclosure
Power cord
0.7-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
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(10), but not currently compatible with macOS


Thunderbolt/USB 3 – Intel JHL7440
Gigabit Ethernet – Realtek RTL8153B


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