Someone explain the difference between core voltage and vtt?

[silverphoenix]

What is the difference between, cpu core voltage, and cpu vtt voltage? like here

 

[malicious]

bump for help - i'd also like to know

 

[duplex]

same here

 

[ghost6303]

from some site i cant remember, just copied into my notes...

Memory uses 4 voltages (Vddq, Vdd, Vr, Vtt) that need to be in very close relationship to each other.

Vdd and Vddq are memory power supplies, for internal electronics and output buffers. They are fed by the same voltage regulator, as they require the same voltage, which we all refer to as Vmem, or Vdimm

the VTT regulator provides power to the processor VID, the chipset- processor front side bus, and misc. buffer signals.