Jmicron Jms579 -

Without getting too technical, UASP reduces the "overhead" of data transfer. In real-world terms, if you are transferring thousands of small files (like a photo library), a JMS579 drive will significantly outperform an older adapter, simply because it can queue commands more efficiently.

The chip supports SATA III (6Gbps). If you put a fast SATA SSD (like a Samsung 870 EVO) into a JMS579 enclosure, you can realistically see sequential read/write speeds of . That is effectively the maximum speed the SATA interface allows, proving that the chip itself is not a bottleneck. jmicron jms579

The JMS579 is technically a controller. If you remember the confusing naming conventions, "USB 3.1 Gen 1" is actually just USB 3.0 (5Gbps). Without getting too technical, UASP reduces the "overhead"