Echo III Rackmount Three-Slot Full-Length Thunderbolt 5 PCIe Card Expansion System

Three Full-Length PCIe Slots
One x16 and two x8 PCIe 3.1 slots support up to three full-height, full-length PCIe cards.

Thunderbolt 5 Performance
Provides up to 3400 MB/s aggregate, bi-directional PCIe bandwidth to installed cards when connected to a Thunderbolt 5 computer.

Broad PCIe Card Support
Supports compatible single- and double-width PCIe 4.0, 3.1, 2.0, and 1.1 non-GPU cards for video, audio, networking, storage, and other specialized applications.

Avid Pro Tools | HDX Support
Qualified by Avid Audio Group for configurations using up to three Pro Tools | HDX PCIe cards without additional parts.

Integrated 400W Power Supply
The built-in universal 400W power supply supports demanding professional PCIe configurations.

75W Auxiliary PCIe Power
Provides auxiliary power for compatible non-GPU PCIe cards requiring additional power.

2U Rackmount Design
The heavy-duty steel enclosure fits a 2U rack space and measures 16.5 inches deep for installation in mobile racks, carts, rack cases, and server environments.

Additional Expansion Space
The Echo III T5 module occupies half of the enclosure, leaving room for a compatible additional Sonnet expansion module.

Ultra-Quiet Cooling
Dual temperature-controlled, variable-speed Noctua fans rated at 17 dBA provide efficient cooling for noise-sensitive environments.

Adjustable Rack Rails
Included extension rails support installation in racks with depths from 16 to 24 inches.

Automatic Power Control
The system automatically powers on and off with the connected computer for simplified operation and energy conservation.

Dual Thunderbolt 5 Ports
One Thunderbolt 5 port connects to the host computer while the second supports an additional compatible Thunderbolt or USB device.

Peripheral Power
The secondary Thunderbolt port supplies up to 15W to compatible bus-powered Thunderbolt or USB devices.

5K Display Support
The secondary Thunderbolt connection can support one compatible 5K display while retaining PCIe bandwidth for installed cards.

Secure Thunderbolt Connection
The included ThunderLok-A connector lock helps prevent accidental Thunderbolt cable disconnections.

General Specifications
Product Type: Thunderbolt 5 to PCIe card expansion system
Form Factor: 2U rackmount enclosure
Enclosure Material: Steel
Rack Depth Compatibility: 16 to 24 in
Additional Module Space: 1 compatible Sonnet expansion module

PCIe Specifications
PCIe Slots: 3
Slot Configuration: 1 x PCIe 3.1 x16, 2 x PCIe 3.1 x8
Supported Card Height: Full-height
Supported Card Length: Full-length, up to 12.28 in
Supported Card Width: Single-width and double-width
Supported PCIe Generations: PCIe 4.0, 3.1, 2.0, 1.1
Aggregate PCIe Bandwidth: Up to 3400 MB/s bi-directional with Thunderbolt 5 host
Avid Pro Tools | HDX Support: Up to 3 cards

Thunderbolt Specifications
Interface: Thunderbolt 5
Thunderbolt Ports: 2
Host Compatibility: Thunderbolt 5, Thunderbolt 4, Thunderbolt/USB4
Secondary Port Power: Up to 15W
Display Support: Up to 1 x 5K display via secondary Thunderbolt port

Power Specifications
Power Supply: Integrated universal 400W
Auxiliary PCIe Power: 75W
Power Control: Automatic power on/off with connected computer

Cooling Specifications
Cooling: Dual Noctua fans
Fan Control: Temperature-controlled, variable-speed
Fan Noise Level: 17 dBA

Computer Compatibility
Mac: Thunderbolt 5, Thunderbolt 4, or Thunderbolt/USB4 equipped Mac
Windows: Thunderbolt 5, Thunderbolt 4, or USB4 equipped computer
Linux: Thunderbolt 5, Thunderbolt 4, or USB4 equipped computer

Operating System Compatibility
macOS: macOS 15 or later
Windows: Windows 11 25H2 or later, Windows Server 2025
Linux Kernel: 6.6 or later

Dimensions and Weight
Width: 19 in (48.3 cm)
Depth: 16.5 in (41.9 cm)
Height: 3.6 in (9.1 cm)
Rack Space: 2U
Weight: 23.15 lb (10.50 kg)

Included Accessories
Power Cable: Region-specific power cable
Auxiliary Power Cable: 6-pin PCIe auxiliary power cable
Thunderbolt Cable: 0.8 m Thunderbolt 5 cable
Cable Lock: ThunderLok-A connector lock
Rack Rails: Adjustable extension rails for 16 to 24 in rack depths
Documentation: Product documentation