It is amazing how much computing power Mac, Windows, and Linux computers with Thunderbolt 4 or Thunderbolt 3 ports offer today's creative professionals. However, these sleek marvels of technology come at a price - they lack PCIe expansion slots to add PCIe cards for connectivity and processing capabilities. Sonnet has a solution: the Echo Express SE I Thunderbolt to PCIe card expansion system provides a compact Thunderbolt expansion system with a single slot, allowing you to connect a single PCIe card to your computer via a single cable.