The Echo Express SE I Thunderbolt 3 to PCIe Card Expansion System from Sonnet provides a PCIe 3.0 x8 slot for Thunderbolt 3-equipped notebooks, SFF desktop systems, and other computers without a PCIe slot. The Echo Express SE I supports full-height PCIe cards, featuring a length up to 7.75". For supporting a wide variety of PCI cards, it sports one expansion slot that can accommodate double-width PCI cards or single-width PCI cards coming with a daughter card. It is suitable for connecting one professional video capture, audio interface, SAS or SATA HBA, 16Gb or 8Gb Fibre Channel, 10Gb Ethernet, or RAID controller PCIe card, which operates over the Thunderbolt connection. There's also an integrated variable-speed fan for cooling your PCI card and the SE I's internal components.
The Echo Express SE I Thunderbolt 3 to PCIe Card Expansion System comes with two Thunderbolt 3 ports, letting you daisy chain up to six Thunderbolt devices to your computer. Each of the two Thunderbolt 3 ports transmits data at a rate of up to 40 Gbps and offers a USB Type-C design, so you can connect the included 1.6' Thunderbolt 3 cable on the first try. Moreover, a ThunderLok 3 Thunderbolt connector retainer clip is supplied to help ensure the cable stays connected to the chassis.
PCIe 3.0 Slot and Space for a Daughter Card
The Echo Express SE I's PCIe 3.0 slot supports a half-length (up to 7.75" long), full-height, single- or double-width PCIe card. Some specialty cards, such as Blackmagic Design's DeckLink 4K Extreme, and RME's HDSPe MADI FX card, include a daughter card that mates with and provides additional external connections to the main card. The daughter card occupies the adjacent expansion slot space without requiring a PCIe slot.
Thunderbolt 3 Technology
The Echo Express SE I - Thunderbolt 3 edition includes two Thunderbolt 3 (USB-C) ports; the first connects it to your computer, while the second supports daisy chaining of up to five additional Thunderbolt peripheral devices to a single port on your computer. The SE I comes with USB 3.1 (10 Gbps) support, meaning you can connect a USB device to the second port using a proper cable or adapter. The SE I also provides full support for connecting two 4K displays @ 60 Hz or one 5K display @ 60 Hz. For connected devices requiring extra power, 15 watts is provided to connected bus-powered devices.
The Echo Express SE I - Thunderbolt 3 Edition's lightweight, yet rugged aluminum outer shell securely protects the installed PCIe card. Inside, the card is protected with a variable-speed, temperature-controlled fan, which ensures that the card and SE I's internal components remain reliably cool. The fan automatically speeds up as necessary to cool the optional PCIe card when it's hot, and slows down when it's cool. Since Echo Express products automatically power on and off with your computer, there is no power switch on the chassis, ensuring you don't waste energy by forgetting to turn it off.
Designed to accommodate cards up to 7.75" long, the Echo Express SE I - Thunderbolt 3 Edition supports most PCIe 3.0, PCIe 2.0, and PCIe 1.1 cards, which are compatible over a Thunderbolt connection.
The Echo Express SE I is designed to be quiet so that it can be comfortably used in noise-sensitive environments. The airflow path within the chassis has been specially designed to enable the temperature-controlled, variable speed fan to quietly and efficiently cool the PCIe card at all times.
Thunderbolt Cable and ThunderLok Included
To connect the Echo Express SE I - Thunderbolt 3 Edition to your computer, Sonnet includes a 1.6' (0.5m) Thunderbolt 3 (40 Gbps) cable and a Sonnet ThunderLok 3 Thunderbolt connector retainer clip to secure the cable to the Echo chassis. Accidental cable disconnection can lead to data loss. Sonnet's ThunderLok 3 is easy to install and use-just slide it over one end of the cable and then plug in the connector and secure it to the chassis by turning a thumbscrew.
Thunderbolt 3 Interface
2 x Thunderbolt 3 (USB Type-C) Ports
1 x PCIe 3.0 x8 Slot
Supports Full-Height, Half-Length Cards
Thunderbolt Cable & ThunderLok Included
2 x Thunderbolt 3 ports
12 V power
1 x PCIe 3.0 x8 mechanical (x4 electrical)
PCIe Cards Supported
One half-length (up to 7.8" / 19.7 cm long), single-width, full-height x8 PCIe card plus one daughter card
Universal 60 W, 100 to 240 V, 50 to 60 Hz
32 to 95°F (0 to 35°C)
Mac OS X 10.12
Windows 10, 8, and 7
Dimensions (W x H x D)
5.6 x 8.6 x 3.5" / 14.2 x 21.8 x 8.9 cm
2.60 lb / 1.18 kg
Thunderbolt 3 (40Gb/s)
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Macfixit Australia is an Australian owned and operated business based in Melbourne, Victoria and we've been operating since 2005.
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1. We will give you a 30-day, money-back guarantee on all our products. This means you can test drive the product in the convenience of your home. This is of course in addition to the standard manufacturer replacement warranties.
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