Echo SE III Thunderbolt 5 Three-Slot PCIe Card Expansion System

Three PCIe Expansion Slots
Three PCIe 3.1 x8 slots support three full-height, half-length+ single-width cards or one double-width card plus one single-width card.

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

Broad PCIe Card Support
Compatible with supported PCIe 4.0, 3.1, 2.0, and 1.1 cards for applications including video, audio DSP, networking, storage, and SAS connectivity.

Compact Desktop Design
The rugged aluminum enclosure provides three-slot PCIe expansion in a compact format suitable for desktop and portable professional setups.

Auxiliary PCIe Power
An auxiliary PCIe power connector supports compatible expansion cards requiring additional power.

Quiet Cooling System
Temperature-controlled Noctua fans automatically adjust their speed to cool installed PCIe cards while maintaining low operating noise.

Automatic Power Control
The expansion system automatically powers on and off with the connected computer, eliminating the need for a separate power switch.

Secondary Thunderbolt Port
A second Thunderbolt 5 port supports an additional Thunderbolt or USB peripheral and provides up to 15W of power to compatible bus-powered devices.

Display Connectivity
The secondary Thunderbolt port can support a compatible 5K display while maintaining available PCIe bandwidth for installed cards.

Secure Thunderbolt Connection
The included ThunderLok connector lock helps prevent accidental disconnection of the Thunderbolt cable.

General Specifications
Product Type: Thunderbolt 5 to PCIe card expansion system
Form Factor: Compact desktop enclosure
Enclosure Material: Aluminum
Supported PCIe Cards: Compatible non-GPU PCIe cards

PCIe Specifications
PCIe Slots: 3 x PCIe 3.1 x8
Supported Card Width: Single-width and double-width
Supported Card Height: Full-height
Maximum Card Length: 7.75 in
Card Configuration: 3 single-width cards or 1 double-width card plus 1 single-width card
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

Thunderbolt Specifications
Host 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

Cooling Specifications
Cooling: Dual temperature-controlled variable-speed Noctua fans
Fan Noise Level: 17 dBA

Power Specifications
Auxiliary PCIe Power: Supported
Power Control: Automatic power on/off with connected computer
Power Adapter: Universal power adapter

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: 6.5 in (16.5 cm)
Depth: 11 in (27.9 cm)
Height: 4.6 in (11.7 cm)
Weight: 3.7 lb (1.7 kg)

Included Accessories
Power Adapter: Universal power adapter
Power Cable: Region-specific power cable
Auxiliary Power Cable: 6-pin PCIe power cable
Thunderbolt Cable: 0.8 m Thunderbolt 5 cable
Cable Lock: ThunderLok-A connector lock
Documentation: Product documentation