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OWC Mercury
Helios 3
PCIe Thunderbolt 3 Expansion Chassis

Thunderbolt 3 | Mac | Windows PC

Use PCIe Expansion Cards with any Thunderbolt 3 Equipped Mac or Windows PC

Mercury Helios 3 is the ideal way to access the PCIe card you need and is perfect for video capturing, video editing, media transcoding, audio processing, ultra-fast networking, data storage, and more via its Thunderbolt 3 interface. Get empowered with the flexibility to upgrade the capabilities of almost any workflow and workstation.
Helios 3 PCIe Thunderbolt 3 Expansion Chassis
Helios 3 Helios 3 Helios 3 Helios 3 Helios 3
Helios 3 rear

Install One PCIe Card + Daisy Chain

Mercury Helios 3 supports one half-length (up to 7.75"), full-height, double-width x16 PCIe 3.0 card to provide a vast array of expansion options.
  • One PCIe card slot + daughter card support
  • Two Thunderbolt 3 ports
  • Thunderbolt daisy-chain up to six devices
  • One mini DisplayPort
Thunderbolt Cable

Thunderbolt Performance Juggernaut

The Mercury Helios 3 is the perfect solution to enhance and expand the computing capabilities of any Thunderbolt 3 equipped Mac or PC. Utilizing Thunderbolt high-performance technology, Mercury Helios 3 is a tour de force that provides the flexibility to use a multitude of PCIe cards with the bandwidth to support their capabilities.

By the Numbers: Thunderbolt Interface Speed Comparison Chart

Thunderbolt 3 40Gb/s
Thunderbolt 2 20Gb/s
Thunderbolt 10Gb/s
USB 3.0 5Gb/s
  • up to 40Gb/s Performance
  •   HD/4K Video Workflows
  •   10Gb/s Networking Interfaces
  •   Pro Audio Workflows
  •   Ultra-Fast Datasets + Storage

Durable, Cool, and at the Ready

A whisper quiet variable speed fan keeps the inside of the Mercury Helios 3's durable aluminum ventilated chassis running cool. It automatically powers on/off with your computer, so it's at the ready whenever you are.
Helios 3 with MacBook Pro with Retina display
Thunderbolt Cable

PCI Express Expands your Computing Capabilities

View more PCIe card options