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OWC Mercury Helios 3 vs Sonnet eGPU Breakaway Box 750ex: Comparison
OWC Mercury Helios 3 and Sonnet eGPU Breakaway Box 750ex separate most on psu wattage: OWC Mercury Helios 3 at 400, Sonnet eGPU Breakaway Box 750ex at 750, 47% in favour of Sonnet eGPU Breakaway Box 750ex.
Specs
| Specification |  |  |
|---|---|---|
| Connection Standard | Thunderbolt 3 | Thunderbolt 3 |
| Brand | OWC | Sonnet |
| Extra Ports | None onboard beyond the GPU's own outputs | 4-port USB hub + Gigabit Ethernet |
| PSU Wattage | 400-47% | 750 |
| Model | Mercury Helios 3 | eGPU Breakaway Box 750ex |
Price comparison
| Retailer | OWC Mercury Helios 3 | Sonnet eGPU Breakaway Box 750ex |
|---|---|---|
| Amazon | View on Amazon |
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
OWC Mercury Helios 3
6 / 10 Expert Rating
Solid basic Mac eGPU box, superseded by the Helios FX which OWC still actively sells.
Sonnet eGPU Breakaway Box 750ex
8 / 10 Expert Rating
The official Mac-certified eGPU enclosure — proven Thunderbolt 3 reliability with genuine dock functionality, limited to double-width cards.