Free Shipping available on most orders $49.00 & up.

Get Details. »
Home  »  OWC Mercury Helios 3
OWC Mercury Helios 3 OWC Mercury Helios 3 Front Left OWC Mercury Helios 3 Front OWC Mercury Helios 3 Back

OWC Mercury Helios 3


1External PCIe Slot

Add a x16 PCIe 3.0 double width card slot

Quick Specs:

  • Thunderbolt 3
  • Mac & Windows

PCIe Thunderbolt 3 Expansion Chassis

  • One PCIe card slot + daughter card support
  • Two Thunderbolt 3 ports
  • Thunderbolt daisy-chain up to six devices
  • One mini DisplayPort
  • Mac and Windows compatible

  • Performance & reliability at an exceptional value
  • Wide array of models & options
  • Top review ratings
  • Industry-leading warranty & support

Buying Options

OWC Mercury Helios 3

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

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.

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.

OWC Mercury Helios 3 Back

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.

OWC Thunderbolt 3 Cables

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.

OWC Mercury Helios 3 with MacBook Pro

Quality You Can Trust

Quality You Can Trust

OWC builds our hardware to the highest standards of reliability and performance. Because 100% reliability is always the goal, we rigorously quality test and back our hardware with a 3 Year OWC Limited Warranty and 24/7 customer support.

Learn More