With all the debate about the upcoming 970 release, and which computers will contain which processors, I felt the need to ask for a little more information on the subject. My biggest question is, What is the difference between the 970 and a Power4? Second, if we had say, a 1 ghz g3, 1ghz g4 and 1ghz g5, how would they vary in terms of speed. Obviously they would first would be slower than the second and so on, but why is it slower, is it just the architecture of it? (I know the 970 is 64mb opposed to the current 32, and that will definitely make a difference, but how else is the speed effected?) Thanks.