The HighPoint Rocket SATA 3Gbps 4-Port PCI Express x4 eSATA RAID Controller from G-Technology is a PCI Express eSATA controller with hardware RAID capabilities. The card adds 4 eSATA ports to your computer, each capable of bus transfer speeds of 3Gb/s. It is port-multiplier aware and fully compatible with Windows and Mac OS X. The card is identical to the host card that ships with the G-SPEED eS.
eSATA storage supports bus transfer rates of up to 300MB/sec