eGPU Breakaway™ Box 750/750ex

eGPU Breakaway™ Box 750/750ex


In stock


  • eGPU Breakaway Box models support up to a standard full-height, full-length, double-width card. Cards with three power connectors are not supported.
  • Not compatible with VIVE Wireless Adapter.
  • Under macOS 10.14.6, a Mac mini is compatible with a Breakaway Box with Vega 56, Vega 64, WX 8200, and WX 9100. A Mac mini with a Breakaway Box with an RX 560/570/580/590 must be booted with a monitor connected to the Mac mini’s HDMI port. The monitor may be moved to the GPU after booting. This anomaly is fixed in macOS 10.15.7+.


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Pro Power Graphics

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

Thunderbolt 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™ 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.

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.



Technical Specifications

Mac, Windows, and Linux Logos


Mac Compatibility

  • macOS Big Sur compatible
  • Mac (Intel®) 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 eGPU Breakaway Box (WX 9100, for example) supports up to six external 4k monitors @60Hz
  • Mac (Intel) 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 AMD RX 590 GPUs
  • Windows 10 support under Parallels Desktop for Mac(4)
  • Support for two eGPU Breakaway Box eGPUs and up to twelve external 4k monitors @60Hz
  • Mac (Intel) 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
  • Mac (Intel) with Thunderbolt 3 ports and macOS 11.4+
    Additional Features:
  • Support added for AMD RX 6800, 6800 XT, 6900 XT
  • Radeon Pro W6800 not yet supported
  • Mac (M1) computers do not support eGPUs
  • Supports VIVE and VIVE Pro with AMD Radeon RX 480 or better(5)
  • External GPUs not supported by Thunderbolt 2 or Thunderbolt 1 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 4 or Thunderbolt 3 port
  • GPU card use requires an eGPU-enabled Windows PC
  • Windows 11, 10
  • Supports VIVE and VIVE Pro with NVIDIA GTX 1060 or AMD Radeon RX 480 or better(5)

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)
  • 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

Graphics Card Compatibility Chart

List of AMD and NVIDIA GPU cards arranged by card manufacturer, compatibility determined by the card’s power requirements, and Breakaway Box model’s power capabilities. Maximum GPU card size 312mm x 140mm x 58mm.


Part Number

  • GPU-750W-TB3 (eGPU Breakaway Box 750)
  • GPU-750EX-TB3 (eGPU Breakaway Box 750ex)


  • 2-year

Form Factor

  • Desktop external GPU system

External Connectors

  • Part No. GPU-750W-TB3
  • One Thunderbolt 3 port
  • Power (C14-type)
  • Part No. GPU-750WEX-TB3
  • One Thunderbolt 3 port
  • Power (C14-type)
  • Four USB Type A
  • One RJ45

Internal Connectors

  • Two 8-pin (6+2 pin) power connectors

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


  • Thunderbolt/USB 3 – Intel JHL6540
  • Gigabit Ethernet – Realtek RTL8153B

Power Supply

  • Universal 750W, 100-240V AC, 50-60 Hz
  • Supports cards requiring up to 375W of continuous power plus an additional 100W peak power

Power Delivery

  • Provides laptop charging up to 85W

Eco-Friendly Power Management

  • See video for description

Standy Power(9)

  • Consumes 8.5W (sleep) / 14W (idle)

Operating Temperatures

  • 0˚C to 35˚C (32˚F to 95˚F)

Dimensions (WxDxH)

  • 7.25 x 13.38 x 8 in. (18.5 x 34.0 x 20.2 cm)


  • 7.1 lbs (3.2 kg)


  • RoHS 3 (Directive 2015/863)
  • IEC62368-1 and IEC62368-2

Package Contents

  • Part Number GPU-750W-TB3
  • eGPU Breakaway Box 750 enclosure
  • Power cord
  • 0.7-meter Thunderbolt 3 (40Gbps) cable
  • Documentation
  • Part Number GPU-750WEX-TB3
  • eGPU Breakaway Box 750ex enclosure
  • Power cord
  • 0.7-meter Thunderbolt 3 (40Gbps) cable
  • Documentation


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