I’ve tested several enclosures featuring the JMS579 against more expensive alternatives. Here is the verdict:
Why do manufacturers love this chip? It usually comes down to three specific factors: jmicron jms579
The is a high-performance USB 3.0 to SATA 6Gb/s bridge controller designed to enable seamless data transfer between USB hosts and SATA-based storage devices. Often integrated into external hard drive enclosures, portable SSDs, and specialized storage solutions like the Western Digital Elements series, the JMS579 serves as the critical link that translates Serial ATA protocols into USB-compatible signals. Technical Architecture and Key Features That is effectively the maximum speed the SATA
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