The Celerity FC-42ES Fibre Channel Host Adapter takes advantage of the latest in host interconnect technology PCI Express, a serial, high-speed connection that supports aggregate throughput up to 1 GB/second (x4 PCIe). Softwarecompatible with existing PCI and PCI-X products, the FC-42ES uses the same device drivers as the other Celerity FC family products, simplifying user installation and support.