What is IEEE 1394b?
There is a new standard of Firewire called IEEE 1394b offering double the speeds of traditional firewire (up to 800 MB/sec). IEEE1394 plugs won’t fit into a IEEE 1394b socket. Note also that most of the new IEEE 1394b cards are 64 bit cards and fit into server motherboards but don’t fit into standard motherboards used in the average home PC and video editing PC.