gracias pero ya visite esa pag amigo por eso las dudas . creo existen sata uno a 300MB/S http://www.sata-io.org/namingguidelines.aspDispelling the Confusion: SATA II does not mean 3Gb/s
The term SATA II has grown in popularity as the moniker for the SATA 3Gb/s data transfer rate, causing great confusion with customers because, quite simply, it’s a misnomer.
The first step toward a better understanding of SATA is to know that SATA II is not the brand name for SATA’s 3Gb/s data transfer rate, but the name of the organization formed to author the SATA specifications. The group has since changed names, to the Serial ATA International Organization, or SATA-IO.
The 3Gb/s capability is just one of many defined by the former SATA II committee, but because it is among the most prominent features, 3Gb/s has become synonymous with SATA II. Hence, the source of the confusion.
For an accurate description of Serial ATA capabilities and the official guideline to SATA product naming, please see the details below.