Sonnet Echo Express III-R (Thunderbolt 3 Edition)


  • Product Description

      Thunderbolt 3 to PCIe Card Expansion System

      Echo Express III-R - Thunderbolt 3 Edition provides PCIe card expansion in a rackmount enclosure. With three PCIe slots, you can use every Thunderbolt-compatible card supported, regardless of length or height. Additionally, this Echo Express system features:

      • Thunderbolt 3 (40Gbps) Interface (with Two Thunderbolt 3 Ports)
      • Provides Space for Installing Additional Mobile Rack Device Mounting Kits
      • Quiet, Temperature-Controlled Fans
      • Integrated 300W Universal Power Supply (with 75W Auxiliary Power Connector for Power-Hungry PCIe Cards)
      • Rugged Aluminum Enclosure
      • 1-meter Thunderbolt 3 Cable
      • Mac and Windows Compatible

      Specifications and appearance are given as guidelines and may change without notice.

  • Product Details

    • Variant: Default Title
    • Product Type: Expansion

In Depth

Key Features

  • Connects Three Full-Length PCIe Cards to any Mac® and Windows Computer with Thunderbolt™ 3 Ports—Use multiple high-performance PCIe cards at the same time
  • Three PCIe 3.0 Slots—Supports three full-height, single-width cards, or one double-width card plus one single-width card
  • 40Gbps Thunderbolt 3 Interface—Offers 2750 MB/s of PCIe bandwidth, doubling the performance of Thunderbolt 2
  • Two Thunderbolt 3 (USB-C) Ports—One port used to connect to the computer; second port supports daisy-chaining of up to five additional Thunderbolt(5) peripheral devices to your computer, attaching a single USB(6) peripheral device, or connecting up to two 4K displays or one 5K display(4)
  • Remarkably Quiet—Large, temperature-controlled, variable-speed fans that automatically cool the cards, plus computer-modeled design that reduces airflow turbulence and velocity, combine to provide quieter cooling for all cards
  • Built-in Universal Power Supply—Integrated 300W power supply with 75W auxiliary power connector
  • Rugged Steel Housing—Provides robust and secure protection
  • Power for Peripherals—Provides up to 15W of power to connected peripherals
  • Every Thunderbolt 3- and macOS®-compatible Card Supported—Works with every Thunderbolt 3- and macOS compatible PCIe card, regardless of length or height
  • Thunderbolt Cable Included—Includes 1-meter Thunderbolt 3 (40Gbps) cable



    Part No.  

    Echo Express III-R (Thunderbolt 3 Edition)

    Thunderbolt 3 to PCIe Card Expansion System

    Warranty 5-year
    Form Factor Rackmount expansion system
    External Connectors Two Thunderbolt 3 ports
    Internal Connector 6-pin Mini-Fit Jr (same type as on legacy Mac Pro motherboard; provides up to 75W of power for PCIe cards that require supplemental power)
    Expansion Slots
    • One x16 mechanical (x8 electrical) PCIe 3.0
    • One x8 mechanical (x8 electrical) PCIe 3.0
    • One x8 mechanical (x4 electrical) PCIe 3.0
    PCIe Cards Supported(7)
    • One full length, full-height, double-width PCIe card, plus one single-width card or
    • Three full length, full-height, single-width PCIe cards
    Compatible PCIe Cards PCIe cards listed on supporting PCIe Card Thunderbolt Compatibility Chart and as specified by card manufacturers
    Power Adapter Universal 300W, 115-230V AC, 50-60 Hz(8)
    Operating Temperature

    0˚C to 35˚C (32˚F to 95˚F)

    Dimensions (WxDxH) 19 x 16 x 3.48 in. (48.26 x 40.6 x 8.85 cm)
    Weight   19 lbs (8.6 kg)
    RoHS Compliant Yes
    Package Contents
    • Echo Express III-R (Thunderbolt 3 Edition) Thunderbolt 3 to PCIe Card Expansion System
    • Power cord
    • 1-meter Thunderbolt 3 cable(9)
    • Documentation
    Note: PCIe cards sold separately



    Mac Compatibility


    PC Compatibility

    • PC with Thunderbolt 3 ports
    • Windows 10 (64-bit Edition Version 1703 or greater)(1)(10)

    Important Note: Windows computers require the latest BIOS and Thunderbolt drivers to support this product. Check with your computer manufacturer for update information


    PCIe Card Compatibility

    For up-to-date PCIe card compatibility see PCIe Card Thunderbolt Compatibility Chart


    Technical Notes

    1. Windows computers require the latest firmware (BIOS) and Thunderbolt drivers to support this product. Check with your computer manufacturer for update information. Not all Mac-compatible PCIe cards are also compatible with Windows. See the PCIe Card Thunderbolt Compatibility Chart for details.
    2. While the Echo Express III-R - Thunderbolt 3 Edition features a 40Gbps Thunderbolt 3 interface, some computers equipped with Thunderbolt 3 use an implementation of Thunderbolt 3 technology that limits PCIe performance to 20Gbps. The MacBook Pro (13-inch, Late 2016, Four Thunderbolt 3 Ports) has this limitation in the two right-hand Thunderbolt 3 ports, while offering full performance from the left-hand ports.
    3. Full performance requires the use of the included Thunderbolt 3 (40Gbps) cable, or other Thunderbolt 3 (40Gbps) cables; look for the Thunderbolt icon AND the number 3 on the connector housings to identify these cables.
    4. One 4K monitor directly supported. Two 4K monitors requires either a 4K monitor with multi-stream transport support (DP out), or a Thunderbolt 3 to Dual DisplayPort adapter. 5K monitor requires a Thunderbolt 3 to Dual DisplayPort adapter. All Thunderbolt 3 Macs support two 4K monitors. Most Thunderbolt PCs support two 4K monitors.
    5. Second Thunderbolt 3 port supports Thunderbolt and Thunderbolt 2 peripheral devices on Macs used with the Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter, sold separately.
    6. Second Thunderbolt 3 port supports USB 3.1 Gen 1 (5Gb) or Gen 2 (10Gb) devices when connected with proper cable or adapter (sold separately).
    7. PCIe cards and Mobile Rack Device Mounting Kit sold separately.
    8. Power supply will operate as low as 90VAC, with linear power deration from 300W @ 115VAC to 240W @ 90VAC.
    9. Sonnet 1-meter Thunderbolt 3 (40Gbps) cable is not compatible with ThunderLok 3.
    10. Official certification pending.