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OWC / Other World Computing Mercury Helios Thunderbolt PCI Express Expansion Chassis


Availability Details


This item has been discontinued by the manufacturer and is no longer available.

Product Highlights
  • Bootable with AHCI Compliant Cards
  • Throughput Up to 10 Gbps
  • Hot-Pluggable
  • Plug and Play
  • Quiet Cooling Fan

The Mercury Helios Thunderbolt PCI Express Expansion Chassis from Other World Computing is fast and flexible with up to 10 Gbps throughput. It's an ideal solution for high-performance PCIe cards made for video capture, video editing, media transcoding, audio processing and data storage. It is bootable with AHCI compliant cards and can daisy-chain up to six devices. Mercury Helios can use any half-length PCIe2.0 card (up to 6.5" (16.51 cm)) to provide a massive boost to your workflow. Thunderbolt equipped computers like the Mac mini, iMac, MacBook Air and MacBook Pro, now have the ability to tap into a wide variety of professional level performance PCIe cards.

The expansion chassis gives you the freedom to use any half-length (up to 6.5" long), full-height, single-width x1, x4 or x8 PCIe card via Thunderbolt technology
It is bootable with AHCI compliant cards and can daisy-chain up to six devices.
The PCIe card expansion facilitates data transfer of up to 10Gbps SSD, 10 Gb Ethernet connectivity, uncompressed HD video capture and more
The Expansion Chassis features a quiet cooling fan with good ventilation and variable speeds
Mercury Helios is hot-pluggable* and automatically switches on/off through your computer
In the daisy-chain the last device can be a bus powered device**
Rugged yet lightweight aluminum housing makes this expansion chassis quite portable

Note:*All devices connected to the PCIe Card must be securely removed before disconnecting the Helios.
**Thunderbolt bus-powered device should be the last device on the chain.

Supported PCIe Cards Form Factor: One half-length up to 6.5" (16.51 cm) long, single width, full-height PCIe card
PCIe Cards: Fibre Channel, 10 Gb Ethernet, RAID Controller, Video Capture, Digital audio, State Solid Drive, SAS controllers such as the OWC Jupiter, FireWire, USB 3.0, eSATA host adapter cards.
Expansion Slot One PCIe 2.0 x8 (x4 mode)
Device Interface PCIe
Port Configuration Thunderbolt - 2x 20 pin-port
Max Data Transfer Rate Thunderbolt - 10Gbps (or 1250MBps)
Interface Bootability Bootable as long as the specific PCIe card installed is bootable
Thunderbolt: Supported on Macs meeting minimum requirements.
Macintosh System Requirements Mac OS X 10.6.8 or later. Including 'Lion' 10.7.x and 'Mountain Lion' 10.8.x
Available Thunderbolt port
Dimensions (HxWxD) 2.9 x 5.7 x 8.8" (7.36 x 22.35 x 7.36 cm)
Weight 2.4 lb (1.08kg)
OWC / Other World Computing Mercury Helios Thunderbolt PCI Express Expansion Chassis
  • Mercury Helios External Enclosure
  • External Power Adapter
  • Color User Manual
  • 3 Year Solution Warranty with 48 Hour Turnaround Time

    by PowerReviews
    OWC / Other World ComputingMercury Helios Thunderbolt PCI Express Expansion Chassis

    (based on 1 review)

    Ratings Distribution

    • 5 Stars



    • 4 Stars



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    • 2 Stars



    • 1 Stars



    Reviewed by 1 customer

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    Unique in its kind

    By triantag

    from Greece

    About Me Frequent User

    Verified Buyer


    • Durable
    • Easy To Install


    • Loud

    Best Uses

    • Gaming
    • Multimedia
    • Office

    Comments about OWC / Other World Computing Mercury Helios Thunderbolt PCI Express Expansion Chassis:

    Great product. Unique in what it does. Transforms your iMac into a video production studio. The SSD accelsior card I bought along with the Helios is extemely easy to install. Solid design, however, it is bulky and requires some space on your desk. Its major drawback though is just one. It's noisy. If speed matters most, you won't regret buying it.

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      Required item: A Thunderbolt Cable (not included) is required to connect this device to a computer.

      Apple -  Thunderbolt Cable (6.6')
      • You Pay: $37.04

      Host Adapters

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      Sonnet -  Allegro FireWire 800 PCIe Card (3-Port)
      • You Pay: $56.74

      Replacement Drives

      OWC / Other World Computing -  240GB Mercury Accelsior_E2 PCIe Solid State Drive Card
      • You Pay: $379.00
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