Advanced Micro Devices Inc (AMD)

[chipguy]

Where is the evidence to support this?

LOL, do you deny the fundamental physics that SOI eliminates the PN junction
capacitance associated with the source and drain active areas of a MOSFET?
Look at the capacitance breakdown on a typical net and do the math.

Does this mean that a) AMD didn't redesign their circuits? or b)AMD didn't
know what the hell they were doing?

There are hundreds of possible reasons why K8 isn't yet clocking as fast as
the latest K7s. Have you considered something as simple as this is the first
implementation of the K8 microarchitecture while AMD has re-implemented
the K7 microarchitecture around half a dozen times? Maybe they've learned
something along the way. Engineers tend to do that.