Relationship between AGP voltage setting in system bios and core/memory voltage?

As per subject. Is there any relationship? My system bios has a
setting for AGP voltage that goes from 1.5v to 1.65v. What
exactly does this setting control? If I increase this number will it
increase the voltage at which my video card runs its core and/or
memory?

 

On an AGP motherboard, there is an AGP bus that runs between
the Northbridge and the video card. The bus signals need a source
of power. There are occasionally video cards, that are not happy
with just 1.5V, and applying a little boost reduces the error rate
to zero. To be honest with you, for the number of people who have
played with that setting, I cannot remember too many cases where
they actually got an observable benefit.

That bus voltage is independent of the GPU core voltage and
the graphics memory chip voltage. The AGP bus voltage should
only be used between the Northbridge and the GPU, on the AGP
bus signals.

Paul