PCI 32bit/33mhz is usually considered around 133 megabytes per second, or 1064 megabits per second

PCI 64bit/33mhz or 32bit/66mhz is 266MBps or 2128Mbps.

PCI 64bit/66mhz is 532MBps or 4256Mbps.

PCIX is 64bit/133mhz, and is 1064MBps or 8152Mbps.

1394 is 50MBps or 400Mbps

1394 rev b is up to 200MBps or 1600Mbps