Connect Two Demanding DV I/O Cards to Computers with Thunderbolt 4 or Thunderbolt 3 PortsFor creative pros in the audio and video broadcasting industries. using the latest high-performance notebook. compact desktop. and all-in-one computers require multiple I/O ports. While these Mac®. Windows®. and Linux® computers include high-performance Thunderbolt™ 4 or Thunderbolt 3 ports. they lack PCIe expansion slots to install specialty cards with dedicated bandwidth to each card.Make Your Broadcast Studio – Echo II DV DesktopComputers such as Mac Studio and other M series Mac computers feature powerful Thunderbolt/USB4 ports. each individually driven by their own dedicated Thunderbolt bus. To harness this dedicated power. Sonnet has a creative solution — the Echo™ II DV Desktop — a professional Thunderbolt to PCIe card expansion system that enables you to connect two (up to) full-length (12.28 inches long) PCIe cards at the same time. via two cables. The Echo II DV Module exploits your computer’s full potential.