Right JD<br><br>PC 386 = Mac G3<br>PC 486 = Mac G4<br><br>There was a PC 586 which is the same as the very first "Intel" chip naming scheme and thats when the numbers were drop in favor for code named Procs, like we see today<br><br>Conversely;<br>Intel chips had far fewer transistors compared to the larger IBM chips for the Macs - This translated that the Intel chips could be "Over Clocked" <-- remember them mhz wars back then? Where as the IBM chips could run at the same speed but at a much lower clock setting, thus achieving the same calcs per nano second.<br><br>Simply;<br>Intel had a smaller "pipe" line back then so they over compensated by over clocking<br><br>