SilverStone ECU06 & ECU07 USB-C Expansion Cards @ TechPowerUp
 

While USB 3.2 Gen 2 10 Gbps connectivity is widely available on modern motherboards, there are plenty of scenarios where the theoretical 1.25 GB/s transfer speeds are insufficient. The SilverStone ECU06 and ECU07 provide USB 3.2 Gen 2x2 interfaces capable of 20 Gbps or 2.5 GB/s, thus allowing for an easy upgrade path as long as a PCIe 3.0 x4 expansion slot is present.

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