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Sonnet Echo III Desktop a 3-Slot Desktop Thunderbolt 3 to PCIe Card Expansion System

Sonnet Echo III Desktop a 3-Slot Desktop Thunderbolt 3 to PCIe Card Expansion System
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Supports Every Thunderbolt 4 Compatible, Non-GPU PCIe Card
Echo III Desktop supports every Thunderbolt compatible, non-GPU PCIe 1.1/2.0/3.0 card available including video capture and transcoding; audio DSP; 6Gb or 12Gb SAS or SATA host bus adapter; 10Gb, 25Gb or Ethernet; SSD storage; and other specialty types to your system.

For creative pros using the latest portable, mini desktop and all-in-one computers in their workflows, onboard processing power alone is not enough to get the job done. While these computers include high-performance Thunderbolt 3 ports to support peripherals, what they lack is PCIe expansion slots to install specialty cards that add needed video and audio inputs, transcode data, and connect to high-speed shared storage and networks. Sonnet has a solution -- the Echo III Desktop -- a professional Thunderbolt 3 to PCIe card expansion system that enables you to connect three (up to) full-length (12.28 inches long) PCIe cards at the same time, via a single cable.

Backward Compatible with Older Macs. No Thunderbolt 3? No problem -- the Echo III Desktop is also compatible with Macs with Thunderbolt 2 ports when used with the bi-directional Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter and a Thunderbolt cable (both sold separately).

  • Adds Connectivity & Capabilities: Connects up to three high-performance non-GPU PCIe cards via a Thunderbolt 3 cable to your computer lacking expansion slots.
  • Pro Tools | HDX Compatible: HDX compatibility mode enables use of up to three Pro Tools | HDX PCIe cards with no additional parts needed.
  • Broad PCIe Card Compatibility: Every Thunderbolt 3 compatible, non-GPU card supported regardless of length or height.
  • Three PCIe 3.0 Slots: One x16 plus two x8 slots support three full-height, single-width cards, or one double-width card plus one single-width card.
  • Pro Power Integrated: 400W power supply with 75W auxiliary power. Saves energy by powering on/off automatically with the computer.

Mac Compatibility

  • Mac (M series)
  • Mac (Intel) with Thunderbolt 3 ports
  • macOS 13+
  • macOS Sequoia compatible


Windows Compatibility

  • Windows computer with Thunderbolt 5 or 4 ports
  • Windows 11

Linux Compatibility

  • Linux computer with Thunderbolt 5 or 4 ports
  • Linux Kernel 6.1, 6.12

WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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Shipping Restrictions
  • This item cannot be shipped to PO Boxes.
  • This item can be shipped only within the U.S.


  • UPC: 732311013195 
  • Mfr's Part #: ECHO-3D-TB3