Which Voltage settings do you specify?

I've been tweaking my Vcore settings in BIOS recently to see how unnecessarily high the Auto setting was. It has made me curious about the rest of the V settings. Which settings do you leave at auto and which settings do you update with specific values? Or does your motherboard allow you to select 'Normal' and do you use it?

The settings I've been eyeing recently are:
QPI/Vtt (IMC) Voltage
PCH Core
DRAM Termination
Ch-A Data VRef.
Ch-B Data VRef.
Ch-A Address VRef.
Ch-B Address VRef.

Creating options for this was kind of tricky. I'm guessing the primary settings people change are for DRAM and Vcore. After that I tried to prioritize. I also tried to make the language somewhat generic, not chipset specific.
4 answers Last reply
More about which voltage settings specify
  1. I voted PLL, PCH/ICH, IMC/QPI/Vtt, Vcore and DRAM, I'm not smart enough to know all of them :L :)
  2. I think that when you star to OC CPU and RAM, you need specify all the voltages.
  3. I don't do the Ch-A & B settings, but other than that, if it's worth doing, it's worth overdoing. :)
  4. I'm feeling pretty good about the main voltage settings. Although admittedly I still don't understand exactly what the PLL and PCH core do. I think I have a good sense for what they affect, but I like to understand all the details and I'm a little shaky there. I don't like to follow a guide that says set this setting to XYZ and then back down til it crashes. I like the ones that explain why you're setting something.

    So some of these settings I've found to be very obscure. Like the DRAM termination, and CH A&B Data & Address VRefs. Where do you find good information about the settings that are discussed so much less often?
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