Technical Specifications

Compatibility

Mac Compatibility

Mac with Thunderbolt 3 ports
Mac with a Thunderbolt 2 or Thunderbolt port with an Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter plus a Thunderbolt 2 cable (both sold separately)
macOS® 10.12.6+
macOS Big Sur compatible

Windows Compatibility

Linux Compatibility

PCIe Card Compatibility

For a list of compatible PCIe cards, view PDF of Sonnet's PCIe Card Thunderbolt Compatibility Chart

Part Number

Warranty

Form Factor

External Connectors

Expansion Slots

PCIe Cards Supported

One half-length+ (up to 7.75 inches long), double-width, full-height x8 PCIe card, plus one single-width card or
Three half-length+, single-width, full-height x8 PCIe cards

Power Adapter

Fan

Operating Temperature

Dimensions (WxDxH)

Weight

RoHS Compliant

Package Contents

Support Knowledge Base

Product Manual

ThunderLok 3 compatible specifically with Sonnet 0.5- and 0.7 meter Thunderbolt 3 cables; Sonnet 1- and 2-meter Thunderbolt 3 cables require ThunderLok 3L.
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.
Full performance requires the use of the included Thunderbolt 3 (40Gbps) cable, or comparable Thunderbolt 3 (40Gbps) cables; look for the Thunderbolt icon AND the number 3 on the connector housings to identify these cables.
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. One Thunderbolt 3 5K monitor directly supported. All Thunderbolt 3 Macs support two 4K monitors. Most Thunderbolt PCs support two 4K monitors.
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).
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).
Noctua fan used in Echo Express SE III units shipped from Sonnet or after August 2018.