Bjorn3D takes a look at the ICY DOCK eSATA 3.5'' HDD Enclosure

SATA has been implemented primarily inside the desktop and more recently in laptops. The benefits of SATA are the higher bandwidth (300MB/s) and thinner cable. Because of these benefits, it has been recently adopted so that it can also be used with an external connector. eSATA is slowly being added to some of today’s high-end motherboards, such as the Asus A8N32-SLI. In order to use the eSATA, the system motherboard needs to have the eSATA connector, or you can buy an expansion card that basically will route the internal SATA externally. The eSATA connector is basically a shielded version of the internal SATA connector with a few differences

ICY DOCK eSATA 3.5'' HDD Enclosure Review