Advanced Micro Devices Inc (AMD)

[chipguy]

No, you're wrong.

I am in a charitable mood today so I will toss you the
clue you are so *desperately* in need of.

Transistor performance in a digital circuit depends
on gate overdrive, the difference between the high
or "1" voltage level and the transistor threshold
voltage. The threshold voltage gradient across a
large dual core chip is on the order of a few mV or
less. But an MPU is a very noisy environment with
fluctuation and cross die differences on the power
rails from IR drop and inductive effects driven by
di/dt are on the order of hundreds of mV.

Like I said, process variation across the CPUs in
a CMP chip is in the noise.