Tenchu,
I don't understand what you mean by "separation of memory and I/O busses." Are you saying Intel sticks the I/O onto the same bus as memory? LOL, that hasn't happened since the 80's.
I think he means that CPU communication to memory and I/O devices goes over the same bus (FSB), which is true. In case of single CPU K8 system, those are separate. But when it gets to > 1 way, memory accesses and data to an from I/O share HT.
Joe