Sonnet Breakaway Box 850 T5
eGPU Gaming, AI Development, Local LLM Inference, Content Creation, Video Editing, Workstation Docking, Medical Imaging
Overview
The Sonnet Breakaway Box 850 T5 is a Thunderbolt 5 external GPU expansion system that transforms compatible Windows 11 laptops and small form factor computers into near-desktop graphics workstations. Featuring a built-in 850W power supply, a PCIe x16 slot supporting triple-wide desktop GPU cards up to 345 mm, and an integrated Thunderbolt 5 dock with downstream Thunderbolt 5, three USB 3.2 Gen 2 Type-A ports, and 5 Gigabit Ethernet, it delivers desktop-class GPU acceleration for video editing, AI/ML inference, medical imaging, and high-fidelity gaming — all through a single Thunderbolt 5 cable. The whisper-quiet temperature-controlled fan maintains stable GPU temperatures under full load, making it suitable for professional and creative environments. Note: GPU is not included; M-series Mac devices do not support external GPUs.
Key Highlights
- Thunderbolt 5 eGPU enclosure with up to 80Gbps bi-directional bandwidth (PCIe 4.0 x4) and up to 120Gbps with Bandwidth Boost — delivers near-desktop GPU performance for Thunderbolt 5, Thunderbolt 4, and USB4 Windows 11 laptops and SFF computers
- Built-in 850W power supply supports today's most power-hungry triple-wide desktop GPUs including NVIDIA GeForce RTX 50-series and AMD Radeon RX 9000-series — with power to spare for future GPU generations
- Includes built-in Thunderbolt 5 dock with one downstream Thunderbolt 5 port (80Gbps, 15W), three USB 3.2 Gen 2 Type-A ports (10Gbps each, 7.5W per port), and a 5 Gigabit Ethernet port for super-fast wired networking
- Ultra-quiet temperature-controlled fan keeps installed GPU cool under sustained load — suitable for noise-sensitive working environments like editing bays, studios, and offices
- Broad GPU compatibility with full-size triple-wide cards up to 345 mm long; Thunderbolt certified for guaranteed compatibility with Windows 11 GPUs; 2-year warranty and lifetime technical support
Video
Technical Specifications
| Brand | Sonnet Technologies |
|---|---|
| Model | Sonnet Breakaway Box 850 T5 |
| Host Interface | Thunderbolt 5 (80Gbps bi-directional, up to 120Gbps with Bandwidth Boost, PCIe 4.0 x4, backward compatible with Thunderbolt 4 and USB4) |
| GPU Slot | PCIe x16 (electrical PCIe 4.0 x4 via Thunderbolt 5, PCIe 3.0 x4 via Thunderbolt 4/USB4, up to triple-width cards) |
| PSU Support | Built-in 850W (included with enclosure) |
| PSU Compatibility | Built-in 850W PSU (dedicated, not user-replaceable ATX; includes GPU power cables) |
| Ports & I/O | 1x Thunderbolt 5 (upstream host 80Gbps connects to computer) 1x Thunderbolt 5 (downstream peripheral 80Gbps 15W) 3x USB-A 3.2 Gen 2 (10Gbps) 1x 5 Gigabit Ethernet (RJ45) |
| Connectivity | Thunderbolt 5 (80Gbps bi-directional, up to 120Gbps with Bandwidth Boost, backward compatible with Thunderbolt 4 and USB4) |