How about 250MB/s for 64-bit VLB or 350MB/s for QuickRing {Apple's
implimentation of VLB (Byte 10/92:132)} QuickRing is interesting in that
it allows interleaving with other card so that the 350MB/s can be divided 
among many cards at the same time {NuBus 90 and MCA are about the only card 
interfaces able to DO anything with that kind of speed and even NuBus 90
ditzes around at ~30MB/s with a burst mode: 80MB/s.
"MCA {Also called Micro Channel}
 IBM's 16 and 32-bit bus; "allows use of more than one CPU in a computer" 
 (DCT) and anything can talk to anything, >>as fast as the two components 
 involved can handle it.<< Never took off because it was incompatible with ISA 
 and EISA.  Planned to be bus interface of IBM PowerPC 601 (Carl Jabido).