The numbers given after the "FireWire", or the "S" give the approximate speed in MBit/s, rounded up to the next 100. The first version can transfer 98.304.000 Bits/s, or 12.288.000 Bytes/s. The versions that came afterwards can do this speed, and multiples of it. Using the SI prefix, this is exactly 98.304 kBit/s, using the binary prefix, it is 96.000 kiBit/s. To avoid confusion, it is rounded to the next closest 100. That way, S3200 does not transfer 3.200 MBit/s, nor 3.200 MiBit/s, but 3.145,728 Mbit/s, or 3.000 MiBit/s. This is approximately 2,93 Gibit/s.