Add the new LaCie eSATA II PCI Express Card 3Gb/s – 4Ports for instant connectivity and amazing performance with your eSATA peripherals. The LaCie eSATA II PCI Express Card 3Gb/s – 4Ports features four external eSATA connectors, and can run at speeds of up to 3Gb/s, making it the best interface choice for professionals who demand high speeds. By including four eSATA 3Gb/s ports, the LaCie eSATA II PCI Express Card 3Gb/s –4Ports card can be used to combine up to four hard disks together with your computer to create a versatile and powerful RAID solution. For example, using the LaCie 4big Quadra*, you can set up each hard disk in a hardware RAID 5 mode, then combine them together into a software RAID 0 mode (with the help of the host computer)**, making this configuration comparable to a RAID 50 array. This allows for enhanced disk failure protection, a greater speed of up to 700MB/s, and up to 24TB capacity (with four 8TB LaCie 4big Quadra each).