The IO Crest 2 Port SATA III PCI-e 3.0 x1 card ( SI-PEX40148 ) is the easiest way to update any computer with SATA ports with a PCI-e x1 slot or larger. Once installed this host card will add SATA ports with two independent channels. This allows support of two SATA devices at speeds of up to 6Gb/s whether it is a SATA hard drive or SATA device. Using the JMB582 chipset, the SI-PEX40148 can provide a maxium sequencial Read / Write Speed of 850 MB/s to 2 SATA 6Gb/s ports. For the storage solution based on data transfer of multiple hard drives, the newly added FIS-based switching design can overcome the bottlenecks created by operating multiple SATA storage devices simultaneously.