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Sonnet Echo Express SE III Thunderbolt 3 to PCIe Card Expansion System



Product Details

Echo Express SE III provides PCIe card expansion in a desktop enclosure. The three PCIe 3.0 x8 slots support three half-length+, full-height, single-width PCIe cards, or one single-width card plus one double-width card. Additionally, this Echo Express system features:

  • Thunderbolt 3 (40Gbps) Interface (with Two Thunderbolt 3 Ports)
  • Quiet, Temperature-Controlled Fan
  • Integrated 120W Universal Power Supply
  • Rugged Aluminum Enclosure
  • Thunderbolt 3 Cable
  • ThunderLok 3 Thunderbolt Connector Retainer Clip
  • Mac and Windows Compatible

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

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    In Depth

    Key Features

    • Connects Three 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, half-length+ (up to 7.75 inches long), 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 reserved for connection to the computer; second port supports daisy-chaining of up to five additional Thunderbolt(5) devices to your computer, attaching a single USB(6) peripheral device, or connecting up to two 4K displays or one 5K display(4)
    • Temperature-controlled Fan—Automatically operates slower and quieter with cooler cards; provides better cooling for hotter cards
    • Energy Saver Mode—Powers on/off automatically with the computer
    • Rugged Aluminum Housing—Provides robust and secure protection
    • Power for Peripherals—Provides up to 15W of power to connected peripherals
    • Nearly Every Thunderbolt 3- and macOS®-compatible Card Supported—Works with every Thunderbolt 3- and macOS compatible PCIe card up to 7.75 inches in length
    • Thunderbolt Cable & ThunderLok Included—Includes 0.5-meter Thunderbolt 3 (40Gbps) cable and ThunderLok 3 Thunderbolt connector retainer clip to secure cable from accidental disconnections


      Part No.  
      ECHO-EXP-SE3 Echo Express SE III Thunderbolt 3 to PCIe Card Expansion System
      Warranty 1-year
      Form Factor Desktop expansion system
      External Connectors
      • Two Thunderbolt 3 ports
      • 12V power port
      Expansion Slot
      • Two x8 mechanical (x8 electrical) PCIe 3.0
      • One x8 mechanical (x4 electrical) PCIe 3.0
      PCIe Cards Supported Three half-length (up to 7.75 inches long), single-width, full-height x8 PCIe cards
      Compatible PCIe Cards(7) See supporting PCIe Card Thunderbolt Compatibility Chart for a partial list of compatible PCIe cards
      Power Adapter Universal 120W, 100-240V, 50-60 Hz
      Operating Temperature

      0˚C to 35˚C (32˚F to 95˚F)

      Dimensions (WxDxH) 6.5 x 11 x 4.6 in. (16.5 x 27.9 x 11.7 cm)
      Weight   2.6 lbs. (1.18 kg)
      RoHS Compliant Yes
      Package Contents
      • Echo Express SE III Thunderbolt 3 to PCIe Card Expansion System
      • Universal power adapter
      • Power cord
      • 0.5-meter Thunderbolt 3 (40Gbps) cable
      • ThunderLok 3 Thunderbolt Connector Retainer Clip(8)
      • Documentation

      Note: PCIe cards old separately


      Mac Compatibility

      • Mac with Thunderbolt 3 ports
      • Mac with Thunderbolt 2 or Thunderbolt ports and Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter
      • macOS 10.12.6+


        PC Compatibility

        • PC with Thunderbolt 3 ports
        • Windows 10 (64-bit Edition Version 1703 or greater)(1)(9)

        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 SE III features a 40 Gbps Thunderbolt 3 interface, some computers equipped with Thunderbolt 3 use an implementation of Thunderbolt 3 technology that limits PCIe performance to 20 Gbps. 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 sold separately.
        8. ThunderLok 3 compatible with Sonnet 0.5 meter Thunderbolt 3 cables, but not with Sonnet 1-meter Thunderbolt 3 cables.
        9. Official certification pending.



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