A8V - Why is Venice minimum voltage 1.1V ?

[biohazard]

Although the A8V can undervolt Winchester cores down to 0.8V, it seems
to be resistant to doing this with Venice cores. Does anyone know why?

I know I'm destined to get helpful suggestion from people without an
A8V-Venice combination, but it would be nice to hear from someone who
either (1) didn't have this problem or (2) did.

email -----> (e-mail address removed)

 

[Ed]

Although the A8V can undervolt Winchester cores down to 0.8V, it seems
to be resistant to doing this with Venice cores. Does anyone know why?

I know I'm destined to get helpful suggestion from people without an
A8V-Venice combination, but it would be nice to hear from someone who
either (1) didn't have this problem or (2) did.

email -----> (e-mail address removed)

My guess is because 1.1V is the lowest vcore "Cool n Quite" uses.

Ed

 

[biohazard]

My guess is because 1.1V is the lowest vcore "Cool n Quite" uses.

I don't use C'n'Q, and even the BIOS will not let you go down below
1.1V. If you set a lower voltage, CrystalCPUID and RMclock both tell
you it's back at 1.1V

 

[asdfasdf_2007]

Athlon 64 CPUs can request specific voltages through VID pins. Asus A8V reads the VID and sets the voltage accordingly. The VID ranges for Winchester and Venice cores are 0.8-1.45v and 1.1v-1.45v correspondingly. Asus A8V also employs voltage offsets for overvolting beyond 1.45v (e.g. when you set 1.65v in BIOS, it sets VID to 1.45v and the offset to +0.2v). Theoretically, negative offsets can also be set, but there is no BIOS version that does this currently and most probably there won't be, considering that socket 939 is discontinued.