The Sonnet Echo III Desktop offers a powerful and flexible solution for expanding PCIe connectivity via Thunderbolt 3, ideal for high-performance PCIe cards.
The Sonnet Echo III Desktop (Thunderbolt 3 Edition) is a versatile desktop expansion system that connects up to three full-length PCIe cards to any computer with Thunderbolt 3 or Thunderbolt 4 ports. This system features three PCIe 3.0 slots, providing ample space for high-performance cards such as audio, video, fiber, RAID, and ethernet PCIe cards. With a robust aluminum housing and an energy-efficient design, it delivers 15W of power to connected peripherals. The system includes a 0.7-meter Thunderbolt 3 cable that supports full 2750 MB/s bandwidth and up to 100W power delivery. It is compatible with Mac, Windows, and Linux and comes with a 2-year product warranty and free lifetime technical support.
Mac Compatibility
Mac (M series) with PCIe cards that have compatible drivers
Mac (Intel®) with Thunderbolt 3 ports
Mac (Intel) with a Thunderbolt 2 or Thunderbolt 1 port with an Apple Thunderbolt 3 (USB-C) to Thunderbolt Adapter plus a compatible Thunderbolt cable (both sold separately)
macOS® 10.12+
macOS Sequoia compatible
Windows Compatibility
Windows computer with Thunderbolt 5, 4, or 3(1) ports
Windows 11 and 10
Linux Compatibility
Linux computer with Thunderbolt 5, 4, or 3 ports
Linux Kernel 5.4+
PCIe Card Compatibility
Part Number
ECHO-3D-TB3
Warranty
2-year
Form Factor
Thunderbolt desktop enclosure
External Connectors
Two Thunderbolt ports(2)
Power (C14-type)
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 (Facing Rear, Left to Right)(3)
One x8 mechanical (x8 electrical) PCIe 3.1
One x16 mechanical (x8 electrical) PCIe 3.1
One x8 mechanical (x4 electrical) PCIe 3.1
PCIe Cards Supported
Three full-length, full-height, single-width PCIe cards or
One full-length, full-height, double-width PCIe card, plus one single-width card
Power Supply
Universal 400W, 115-230V AC, 50-60 Hz(4)
Operating Temperature
0ºC to 35ºC (32ºF to 95ºF)
Dimensions (WxDxH)
3.5 x 16.7 x 9 in. (8.9 x 42.4 x 22.9 cm)
Weight
9.7 lbs (4.40 kg)
Compliance
RoHS 3 (Directive 2015/863)
IEC62368-1 and IEC62368-2 Safety
Echo III Desktop Thunderbolt Expansion System
Region-specific power cable for US, Australia, Europe, Japan, Switzerland, or UK
6-pin PCIe auxiliary power cable
0.7- meter Thunderbolt cable(5)
ThunderLok (Thunderbolt connector retainer clip)(6)
Documentation