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The OWC Mercury Helios 3S is an enclosure that allows you to use a PCIe card connected to your computer via Thunderbolt. The OWC Helios 3S enclosure is compatible with computers running macOS and Windows. Take advantage of the additional PCIe card by connecting it to a Mac mini, iMAC, MacBook, or other computer with a Thunderbolt port.
OWC Mercury Helios 3S Obudowa 1x PCIe 1x DP 2x Thunderbolt
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OWC Mercury Helios 3S is a solution that allows you to connect a PCIe card to a computer with a Thunderbolt port
The OWC Mercury Helios 3S is an easy-to-use, high-performance expansion solution that adds an external PCIe slot to your Thunderbolt-equipped computer. Now you can maximize your existing PCIe investment—or expand it!—while enjoying the flexibility to add a professional card for video production, transcoding, audio processing, data storage, high-speed networking, or high-speed storage.
Capture, stream and share in seconds
With two 40Gb/s Thunderbolt ports (backward compatible with Thunderbolt 2/Thunderbolt), the Mercury Helios 3S offers the bandwidth needed to support data-intensive 4K capture cards to accelerate diverse video workflows like vlogging. Boost your DAW with external DSP acceleration and run larger mixes with multiple plug-ins. Live stream the action of your gaming sessions or share files over a 10GbE or Fibre Channel network without throttling.
Professional-level performance cards for every need
The Mercury Helios 3S supports a wide range of professional half-length, full-height, single-width, or double-width PCIe cards from leading brands such as AJA, Apogee, ATTO, Avid Pro Tools, Blackmagic Design, CalDigit, HighPoint, Intel, Solid State Logic, Universal Audio, and OWC:
- Video capture
- Digital audio
- Solid State Drive (SSD)
- 40GbE/10GbE network cards
- SAS controllers
- Firewire, USB, or eSATA host adapters

Add new possibilities to your work environment
Thunderbolt offers more than just speed. The Mercury Helios 3S harnesses the full power of Thunderbolt to give your Mac or PC extra potential. Daisy chain up to five additional Thunderbolt peripherals for incredible work or play options. Charge your notebook with 85W of power while you work. You can even add an 8K display via DisplayPort to expand your viewing space.
Plug and play
No special software or drivers are needed… simply connect the Mercury Helios 3S to an open Thunderbolt 3 port on your computer using the included cable to instantly expand your system's capabilities.
No tools are required either…just unscrew two thumb screws, insert the card, and start enjoying increased productivity wherever your work takes you.
Product specifications:
- Product code: OWCHELIOS3S
- Color: Black
- Material: Aluminum
- OS Compatibility: macOS 10.13 or later, Windows 10 or later
- PCIe Cards Supported: Mechanical: x16 slots and cards supporting half-length, full-height, and double-width form factors
- Bandwidth: PCIe 3.0 x4. Cards requiring at least x8 or more PCIe lanes are not supported.
- GPUs are not supported
- If the card requires a driver, it must support Thunderbolt.
- Cards requiring more than 75W are not supported.
- RoHS certificate
- Ports: 2x Thunderbolt 3, 1x DisplayPort 1.4
- Chipset: Thunderbolt 3: Titan Ridge (JHL7440)
- Expansion Slot: PCI Express 3.0 (x4) interface with physical x16 slot
- Supports dual-display setups via Thunderbolt 3 and DisplayPort
- DisplayPort does not support DP++
- If you are using a DisplayPort to HDMI adapter, make sure you are using an active adapter.
- Power: AC Input 2.2A 100-240V 50-60Hz, DC Output 12.5A 12V, Power 150W
- Dimensions: Height: 8.2 cm (3.2 in), Width: 14.3 cm (5.6 in), Length: 23.3 cm (9.2 in)
- Weight 1.6 kg (3.64 lbs)
