Sonnet Technologies today announced the launch of the Echo III Desktop and Echo III Rackmount, the newest members of the company's award-winning family of Thunderbolt 3 to PCI Express (PCIe ) card expansion systems. The Echo III Desktop is a full-size desktop chassis that enables the use of up to three high-performance PCIe cards with computers equipped with Thunderbolt ports, while the Echo III Rackmount offers the same support and features in a rack-mountable 2U enclosure. Replacing the popular Echo Express III-D and III-R (including HDX Editions), the new Echo systems have been upgraded with the addition of a mode switch that enables the use of multiple Avid Pro Tools|HDX PCIe cards and new cooling fans for even quieter operation. Both of these units have been Avid-qualified.