The Beckhoff C66xx Industrial PC series offers high flexibility and small device dimensions. The control cabinet PC is equipped with top-performance components and is available in two versions: the C6640 with compact design, and the C6650 with up to two hard drives, built into removable frames, which together with the on-board RAID controller, form a RAID 1 system with two mirrored hard drives. The series includes two versions with powerful Intel® Core™2 Duo or Core™2 Quad processors on a Beckhoff ATX motherboard. Three free PCI and three PCI Express x1 slots are available for plug-in cards with a length of up to 210 mm (8.3").