Echo Express SE IIIe PCIe Thunderbolt 3 Expansion Chassis – Three slots

Sonnet’s Echo Express SE III is a compact desktop Thunderbolt-to-PCIe card expansion system that enables you to connect three professional PCIe cards—including video capture, audio interface, SAS or SATA HBA, 16Gb or 8Gb Fibre Channel, 10 Gigabit Ethernet, and RAID controllers—at the same time to any Mac with a Thunderbolt 3 port.

The Echo Express SE III features a 40Gbps Thunderbolt 3 interface, which offers double the PCIe bandwidth and connectivity of Thunderbolt 2, and yields up to 2750 MB/s of bandwidth, enabling it to support 4K video capture and processing cards at high frame rates, and 16Gb FC cards and dual-port 10GbE cards at full performance. With the ability to handle multiple demanding, high performance PCIe cards, support for connecting two 4K displays @ 60Hz or one 5K display @ 60Hz, and support for a vast array of Thunderbolt and USB devices, Thunderbolt 3 is a leap forward in every way.

Three PCIe Slots
The Echo Express SE III’s PCIe 3.0 x8 slots support three half-length+, full-height, single-width PCIe cards, or one single-width card plus one double-width card.
Double-width?
Some specialty cards, such as RME’s HDSPe MADI FX card, Blackmagic Design’s DeckLink 4K Extreme, and the Lynx AES16e 50, include a daughter card that mates with and provides additional external connections to the main card.

Connects Three PCIe Cards to any Mac with Thunderbolt 3 Ports—Use multiple high-performance PCIe cards at the same time
Three PCIe 3.0 Slots—Supports three full-height, half-length+ (up to 7.75 inches long), single-width cards, or one double-width card plus one single-width card
40Gbps Thunderbolt 3 Interface—Offers 2750 MB/s of PCIe bandwidth, doubling the performance of Thunderbolt 2
Two Thunderbolt 3 (USB-C) Ports—One port reserved for connection to the computer; second port supports daisy-chaining of up to five additional Thunderbolt devices to your computer, attaching a single USB peripheral device, or connecting up to two 4K displays or one 5K display
Rugged Aluminum Housing—Provides robust and secure protection
Temperature-Controlled Fan—Automatically operates slower and quieter with cooler cards; provides better cooling for hotter cards
Energy Saver Mode—Powers on/off automatically with the computer
Nearly Every Thunderbolt 3- and macOS-compatible Card Supported—Works with every Thunderbolt 3- and macOS compatible PCIe card up to 7.75 inches in length
Thunderbolt Cable & ThunderLok Included—Includes 0.5-meter Thunderbolt 3 (40Gbps) cable and ThunderLok 3 Thunderbolt connector retainer clip to secure cable from accidental disconnections