PCI Express is the new standard that will replace PCI. The new PCI Express interface effectively quadruples the amount of available computing bandwidth, resulting in faster music downloads, smoother streaming video, and lightning-fast access to mass-storage devices.The Belkin SATA II RAID 2-Port PCI Express Card offers the perfect solution for users who want to add Serial ATA II ports to their computers. The Card is designed to take advantage of the additional bandwidth and features provided by the new PCI Express I/O interconnection standard. Now you can download multiple large files at the same time without worrying that your computer will freeze, crash, or slow down to a trickle. The PCI Express Card future-proofs your computer with technology so advanced that it exceeds the processing-speed capability of many devices currently on the market. Installing the PCI Express Card now will give you device-upgrade expansion room for many years to come.