the data lines were clocked at seven times the clock signal, so each clock "tick" moved 7 bits of data over each of the bus lines. for the apple implementation this meant 7 bits times 6 links at 50 million times a second, for a raw data rate of 2.1 gbit/s. ten bits of the 42 were used for signalling and control, leaving 32 for data, resulting in a net data transfer rate of 1.6 gbit/s, or 200 mb/s. this was only slightly faster than contemporary (1993) versions of pci at ~130 mb/s, but much faster than nubus of the same era, at about 20 mb/s.