SATA Express, which theoretically supports bandwidth up to 2GBps, essentially doubles throughput of SATA IIIâ€”after the hit caused by overhead and cabling, that is. Twice the bandwidth is, of course, the next logical increment, but we’ve pushed the SATA interface to its limit. Hence, the Serial ATA International Organization (SATA-IO) was hard pressed to come up with something faster. And that’s just what it has done.
Read the entire review at Digital Trends.