Echo III Desktop 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 card configurations.

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

Rugged Aluminum Enclosure
The lightweight aluminum outer shell securely houses the PCIe card assembly and integrated power supply.

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

Automatic Power Control
The system automatically powers on and off with the connected computer for convenient 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 provides up to 15W of power to compatible bus-powered Thunderbolt or USB devices.

5K Display Support
The secondary Thunderbolt port 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: Desktop enclosure
Enclosure Material: Aluminum
Supported PCIe Cards: Thunderbolt-compatible non-GPU PCIe cards

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: 3.5 in (8.9 cm)
Depth: 16.7 in (42.4 cm)
Height: 9 in (22.9 cm)
Weight: 9.7 lb (4.40 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
Documentation: Product documentation