Thanks again. After reading the Intel documents most of what I read makes more sense and you have helped to verifiy this.
Though I do want to question Vtt since you pointed out anand's refernce to it killing their $1,000 quad core by setting that voltage too high.
As you mentioned Vtt is voltage to the FSB. My DSL3 bios has a setting for "FSB OverVoltage Control."
Your answers imply these are not the same yet in my limited understanding they seem to be the same thing. Though I do understand the way MB manufacturer's label items in bios it could sometimes not be the same thing or one has to try to confirm that the item in bios is what you are looking for.
This article is about advanced control of the FSB for quad cord processors but as I understand it, Vtt is FSB voltage.
Theory of Operation - Increasing Target Performance
VTT, sometimes referred to in the Basic Input/Output System (BIOS) as the FSB Termination Voltage, provides the low level signaling bias needed for the processors, chipsets, and all other devices on the bus to communicate. The FSB is the electrical interface that connects the processor to the chipset (also called the processor system bus or the system bus). All memory and I/O transactions as well as interrupt messages pass between the processor and chipset over the FSB.
VTT, sometimes referred to in the Basic Input/Output System (BIOS) as the FSB Termination Voltage, provides the low level signaling bias needed for the processors, chipsets, and all other devices on the bus to communicate. The FSB is the electrical interface that connects the processor to the chipset (also called the processor system bus or the system bus). All memory and I/O transactions as well as interrupt messages pass between the processor and chipset over the FSB.
I would also like to share this document for anyone interested in this discussion. I only found these references after getting Lsdmeasap's excellent explanations. They seem to be from Intel and surprising me they are about overclocking.
Intel Processor Power Delivery Design
Guidelines and Specifications: Vdroop Explained
Guidelines and Specifications: Vdroop Explained
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