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Blackmagic Design Blackmagic eGPU vs Sonnet eGFX Breakaway Box 350: Comparison
Blackmagic Design Blackmagic eGPU and Sonnet eGFX Breakaway Box 350 separate most on host power delivery: Blackmagic Design Blackmagic eGPU at 85, Sonnet eGFX Breakaway Box 350 at 15, 82% in favour of Blackmagic Design Blackmagic eGPU. PSU Wattage splits them by another 40%, again favouring Blackmagic Design Blackmagic eGPU.
Specs
| Specification |  |  |
|---|---|---|
| Connection Standard | Thunderbolt 3 (dual ports for daisy-chaining) | Thunderbolt 3 |
| Brand | Blackmagic Design | Sonnet |
| Extra Ports | HDMI, DisplayPort, 2x USB-A 3.1, additional Thunderbolt 3 | None onboard beyond the GPU's own outputs |
| PSU Wattage | 580 | 350-40% |
| Host Power Delivery | 85 | 15-82% |
| Cooling Type | Active fan, designed by Apple for quiet operation | Active, ultra-low-noise Noctua fan |
| Model | Blackmagic eGPU | eGFX Breakaway Box 350 |
| Price | Launched at $699 (2018), discontinued | Launched around $299 (2017) |
Price comparison
| Retailer | Blackmagic Design Blackmagic eGPU | Sonnet eGFX Breakaway Box 350 |
|---|---|---|
| Full Compass | View on Full Compass |
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Verdict
Blackmagic Design Blackmagic eGPU
6.5 / 10 Expert Rating
A clean, quiet, Mac-tailored eGPU that was easy to buy and use, but has been discontinued for years and can't be upgraded.
Sonnet eGFX Breakaway Box 350
6 / 10 Expert Rating
A niche but well-executed pick for single-slot cards and quiet operation, not for gaming-class GPUs.
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