- Brand: Sonnet
- Model: eGPU Breakaway Box 750ex
- UPC: 732311013027
- MPN: GPU-750WEX-TB3
- 1 x PCIe 3.0 x16 Slot
- 1 x Thunderbolt 3 Port
- Supports 2-Slot Wide, Full Length GPU
- Built-In 750W Power Supply
- 85-Watt Power Delivery
- 4 x USB 3.2 Gen 1Type-A Ports
- 1 x RJ45 Gigabit Ethernet Port
- Mac and Windows Compatible
- Dispatch after 2 days
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Sonnet External GPU Expansion System
Sonnet eGPU Breakaway Box 750ex
Thunderbolt 3 external GPU enclosure with integrated USB and Gigabit Ethernet hub
The eGPU Breakaway Box 750ex is designed for users who need powerful external graphics expansion and practical desktop connectivity through one Thunderbolt connection. Install a supported full-length, double-width GPU card and connect the enclosure to a compatible Thunderbolt computer to accelerate video editing, rendering, color grading, 3D workflows, multi-display output, and gaming while also adding USB Type-A and wired Ethernet ports.
Key Highlights
High-Power eGPU Performance with Extra Docking Ports
The 750ex combines a powerful Thunderbolt to PCIe graphics enclosure with a built-in connectivity hub, making it ideal for notebook users, creative workstations, studio setups, and compact desktops that need both GPU acceleration and everyday I/O expansion.
Professional Workflow Upgrade
Turn a Thunderbolt Notebook Into a Graphics Workstation
Many creative and engineering applications rely on GPU power for real-time previews, effects processing, export acceleration, rendering, AI-assisted workloads, 3D viewport performance, and multi-monitor output. The Breakaway Box 750ex provides a simple external upgrade path for compatible Thunderbolt computers limited by integrated or low-power mobile graphics.
Broad GPU Card Support
Supports popular Thunderbolt-compatible GPU card families, including AMD Radeon and Radeon Pro cards, NVIDIA GeForce RTX, TITAN, and Quadro cards on supported Windows systems, plus supported AMD cards on compatible Intel Macs.
Full-Length PCIe Expansion
The internal x16 mechanical PCIe 3.0 slot supports one full-length, full-height, double-width card, making the enclosure suitable for many graphics cards and selected Thunderbolt-compatible PCIe expansion cards.
Use Cases
Designed for GPU-Heavy Creative and Professional Workloads
Video Editing
Accelerate timelines, effects, transitions, previews, encoding, and export tasks in GPU-powered editing applications.
Color Grading
Improve performance in grading workflows that rely on GPU compute for nodes, effects, noise reduction, and real-time playback.
3D Rendering
Add workstation graphics power for 3D design, rendering previews, ray tracing workflows, and GPU-accelerated content creation.
Animation and VFX
Boost creative work in animation, compositing, special effects, and high-resolution visual production pipelines.
Gaming Setup
Use a supported external GPU to drive gaming graphics on an external monitor or compatible laptop display workflow.
Docking Expansion
Connect USB peripherals and wired networking through the 750ex integrated USB and Gigabit Ethernet hub.
Power and Card Support
750W Power Supply for Demanding Graphics Cards
The Breakaway Box 750ex uses a universal 750W power supply and includes two 8-pin 6+2 auxiliary power connectors. It supports compatible GPU cards requiring up to 375W of continuous power, with additional peak power headroom for demanding GPU loads.
750W Internal PSU
High-capacity power design helps support power-hungry desktop graphics cards inside an external Thunderbolt enclosure.
Two 8-Pin Connectors
Includes two 8-pin 6+2 auxiliary connectors for compatible GPU cards that require PCIe power.
Double-Width GPU Fit
Supports one full-length, full-height, double-width card, with maximum GPU dimensions up to 312mm x 160mm x 55mm.
Extra Connectivity
Built-In USB Hub and Gigabit Ethernet
The 750ex version adds a useful connection hub for everyday workstation accessories. Four USB 3.2 Gen 1 Type-A ports allow keyboard, mouse, storage, audio, controller, or other USB peripherals to be connected, while the RJ45 Gigabit Ethernet port provides reliable wired network access through the same Thunderbolt connection.
Four USB Type-A Ports
Adds four 5Gb/s USB 3.2 Gen 1 Type-A ports for common peripherals and desktop accessories.
RJ45 Gigabit Ethernet
Connect to a wired network for stable office, studio, and home workstation networking.
Dual Controller Design
The 750ex is designed to support both the installed card and the integrated peripherals through a single Thunderbolt cable.
Cooling Design
Quiet, Temperature-Controlled Cooling
The enclosure uses an optimized airflow design with a large variable-speed temperature-controlled fan. It quietly cools the installed card during lighter workloads and automatically adjusts airflow as the card and chassis temperature increase.
For best reliability, keep the side and rear ventilation areas open and do not block the airflow path.
Thunderbolt Performance
Single-Cable Graphics and Dock Expansion
Connect the Breakaway Box 750ex to a compatible computer using a certified Thunderbolt cable. The Thunderbolt interface delivers high-bandwidth PCIe connectivity to the installed card, provides upstream charging for compatible notebooks, and carries the integrated USB and Ethernet hub connection.
Simple GPU Installation
Install a supported PCIe graphics card, connect the auxiliary power connectors, close the chassis, and connect the enclosure to a Thunderbolt port on your computer.
External Monitor Ready
Connect displays directly to the installed GPU card output ports to access the best eGPU acceleration experience in compatible creative and gaming workflows.
Model Clarity
Breakaway Box 750ex vs Standard 750
This HTML description is written specifically for the Sonnet eGPU Breakaway Box 750ex model. The 750ex keeps the high-power 750W eGPU class and adds practical docking features that are not listed for the standard Breakaway Box 750.
eGPU Breakaway Box 750ex
- Part number: GPU-750WEX-TB3
- Thunderbolt 3 to PCIe expansion enclosure
- 750W internal power supply
- Four USB 3.2 Gen 1 Type-A ports
- RJ45 Gigabit Ethernet port
- 85W upstream notebook charging
eGPU Breakaway Box 750
- Part number: GPU-750W-TB3
- Same general high-power eGPU family
- 750W internal power supply
- One Thunderbolt 3 port
- No built-in USB hub listed
- No RJ45 Ethernet port listed
Compatibility Notes
Check Computer, OS, and GPU Support Before Installation
Windows Systems
Compatible Windows computers require a Thunderbolt 5, Thunderbolt 4, or Thunderbolt 3 port and Windows 11 according to Sonnet's current compatibility notes for the 750 series.
Intel Mac eGPU Support
Only Intel Macs support eGPU cards. macOS eGPU support is limited to supported AMD GPU cards and compatible macOS versions.
Apple Silicon Note
M series Macs do not support eGPU cards, but may use the 750ex with certain Thunderbolt-compatible non-GPU PCIe cards where drivers are available.
Compatibility depends on computer model, Thunderbolt implementation, operating system version, installed GPU model, GPU driver availability, and application support for external GPU acceleration.
Official Product Video
Sonnet Breakaway Box 750 and 750ex Overview
Review Sonnet's product overview video for setup, model positioning, and the difference between the standard 750 and 750ex versions.
Technical Specifications
Sonnet eGPU Breakaway Box 750ex Specifications
| Product Name | Sonnet eGPU Breakaway Box 750ex |
|---|---|
| Part Number | GPU-750WEX-TB3 |
| Form Factor | Desktop external GPU and PCIe card expansion system with integrated hub |
| Host Interface | Thunderbolt 3 |
| External Connectors | One Thunderbolt 3 port, one C14-type power input, four USB Type-A ports, and one RJ45 port |
| USB Ports | Four USB 3.2 Gen 1 Type-A ports, 5Gb/s |
| Network Port | One RJ45 Gigabit Ethernet port |
| Expansion Slot | One x16 mechanical PCIe 3.0 slot, x4 electrical via Thunderbolt |
| PCIe Card Support | One full-length, full-height, double-width PCIe card |
| Maximum GPU Size | Up to 312mm x 160mm x 55mm |
| Internal Power Connectors | Two 8-pin 6+2 auxiliary power connectors |
| Power Supply | Universal 750W, 100-240V AC, 50-60 Hz |
| GPU Power Support | Cards requiring up to 375W continuous power plus additional 100W peak power |
| Laptop Charging | Thunderbolt Power Delivery up to 85W |
| Cooling | Large variable-speed, temperature-controlled fan |
| Operating Temperature | 0°C to 35°C / 32°F to 95°F |
| Dimensions | 7.25 x 13.38 x 8 in. / 18.5 x 34.0 x 20.2 cm |
| Weight | 7.1 lbs / 3.2 kg |
| Compliance | RoHS 3, IEC62368-1 and IEC62368-2 safety |
| Warranty | 2-year product warranty |
| Package Contents | eGPU Breakaway Box 750ex enclosure, region-specific power cable, 0.8-meter Thunderbolt cable, documentation |
FAQ
Frequently Asked Questions
Does the eGPU Breakaway Box 750ex include a graphics card?
No. It is an add-your-own-card external GPU enclosure. A compatible GPU card must be purchased and installed separately.
What is the difference between the 750ex and the standard 750?
The 750ex adds four USB 3.2 Gen 1 Type-A ports and one RJ45 Gigabit Ethernet port. The standard 750 is focused on Thunderbolt to PCIe graphics expansion and does not list those integrated hub ports.
Can it work with Windows PCs?
Yes, supported Windows computers with Thunderbolt 5, Thunderbolt 4, or Thunderbolt 3 ports can use the 750 series with Windows 11, subject to GPU driver and system compatibility.
Can it work with Mac computers?
Intel Macs can support eGPU cards when using supported AMD graphics cards and compatible macOS versions. M series Macs do not support eGPU cards, although they may work with certain non-GPU Thunderbolt-compatible PCIe cards.
What GPU size can fit inside?
The 750 series supports cards up to 312mm x 160mm x 55mm, with one full-length, full-height, double-width PCIe card supported.
Can the 750ex charge a notebook?
Yes. It provides up to 85W upstream Power Delivery through Thunderbolt for compatible notebook computers.
Can I install non-GPU PCIe cards?
Yes, selected Thunderbolt-compatible PCIe cards may be supported, such as pro audio, DSP, video I/O, or transcoding cards, depending on driver and system compatibility.
Does Thunderbolt cable quality matter?
Yes. Use a certified Thunderbolt cable for reliable performance. Generic USB-C cables are not the same as Thunderbolt cables and may not work for eGPU use.
