I guess my question is a bit problemativ, cause "ports on PowerPC Macs" includes so many different motherboards, with different design. I wondered, if all ports on PowerPC Macs are seperate (if you know what I mean). Some one some time ago told me, that he has low speeds on his powerbook using the USB ports simultaneously, because they were on the same controller. I am not by anyway really into the technology part of Computers (that go above the knowledge of parts). What I am assuming is, that there should be ports that are somehow seperate and can get data in at one time and give it out through the other with less delay, while other Motherboard designs seem to feature ports that somehow buffer the data and then give it out through the other port. Does this make any sense? Sorry for my wired question, maybe someone understands what I am puzzled about. My question would be, which PPC-Models had ports that had a seperate logic?