To all the people.

There is a reason B0 performs badly.And its not intentional by AMD.
Design of the architecture and simulations were made before any silicon.
After that both Intel and AMD put out revisions, in which they fix bugs and increase clockspeed.
They do not design separate chip dies for validating purposes.Point of validating is having fully functional hardware, because u cant validate properly if you have a cpu that doesnt work like it should.
You can of course do it partially.
Pretty much every ES chip has the same IPC as final revision, or at least very near.
Thoroughbred A and B had the same performance, A was hot and clocked lower.They fixed that with adding another metal layer.But IPC was the same.
First Hammer ES`s at 800mhz had pretty much the same performance PER CLOCK as the one that eventually hit retail.
List is endless.Phenom B1 on the other hand, had to be crippled because it had a bug.

We all agree that B0 performs poorly (catastrophically).
JF says its a design choice by AMD.And its not about clocks.
I say Clocks are a ES problem always.However poor performance IPC wise is always due to some bug.

What im getting at, there is some technical pure and simple reason for weird performance figures.
And its not some esoteric marketing wording.
Performance comes from somewhere.It comes from IPC and Clocks.I AM DISCARDING CLOCKS in that regard!

And let me make myself clear.IM NOT TALKING THAT BD WILL BE A FAILURE ,or that it performs poorly.
However using logic im pretty confident B0 stepping has more problems than just clocks.