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OWC Mercury Helios 3 vs ZimaSpace Zima 800W OCuLink GPU Dock: Comparison
OWC Mercury Helios 3 and ZimaSpace Zima 800W OCuLink GPU Dock separate most on max gpu length: OWC Mercury Helios 3 at 290, ZimaSpace Zima 800W OCuLink GPU Dock at 4090, 93% in favour of ZimaSpace Zima 800W OCuLink GPU Dock. PSU Wattage splits them by another 50%, again favouring ZimaSpace Zima 800W OCuLink GPU Dock.
Specs
| Specification |  |  |
|---|---|---|
| Connection Standard | Thunderbolt 3 | OCuLink, 64 Gbps |
| Brand | OWC | ZimaSpace (IceWhale) |
| Extra Ports | None onboard beyond the GPU's own outputs | None beyond the OCuLink connector |
| PSU Wattage | 400-50% | 800 |
| Max GPU Length | 290-93% | 4090 |
| Cooling Type | Active Fan | Open-frame, relies on ambient airflow and card's own cooler |
| Model | Mercury Helios 3 | 800W OCuLink GPU Dock |
| Price | Launched around $299 (2018) | Around $150-$200 |
Price comparison
| Retailer | OWC Mercury Helios 3 | ZimaSpace Zima 800W OCuLink GPU Dock |
|---|---|---|
| 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Solid basic Mac eGPU box, superseded by the Helios FX which OWC still actively sells.
ZimaSpace Zima 800W OCuLink GPU Dock
6 / 10 Expert Rating
Strong PSU headroom for the price in an open, no-frills frame — a solid budget pick for OCuLink-equipped handhelds and mini PCs.
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