SilverStone ECU06, 1x USB-C 3.2, PCIe 3.0 x4

The SilverStone ECU06 and ECU07 each perform exactly as you would expect them to, essentially doubling the performance from 10 Gbps to 20 Gbps USB-C interfaces. This is immediately noticeable with modern NVMe drive enclosures that also utilize the 20 Gbps standard. Thus, both cards deliver on their core promise of enabling that performance while providing the right interface type for your environment. There are several other options out there for both these interface types, using exactly the same ASMedia IC as well. Those clock in at around $40 to $60, putting the ECU06 and ECU07 $70 price tag a bit on the high. Some of the alternatives also provide the ability to connect SATA power for additional power needs, which is lacking on the SilverStone cards, even if such a need is extremely rare. But both the ECU06 and 07 use longer-lasting, higher-quality solid polymer capacitor while the cheapest alternatives stick with the cheaper electrolytic kind, which speaks to the quality of component used. In the end, no matter which one you end up picking, they all should work just fine, but the SilverStone ECU06 and ECU07 should give you better customer support and have a higher lifespan for the additional cost.