Okay there's one thing I'm slightly confused about: This thread explains how to set the GTL Ref voltages, however when looking at examples of what people have set, their are always 2 of the 4 which are higher (~50) and 2 of the 4 that are lower (~10):
Example:
GTL ref 0: +50mv
GTL ref 1: +10mv
GTL ref 2: +50mv
GTL ref 3: +10mv

Is that because 0 is the maximum and 1 the minimum? Should that not be mentioned in the first post?



2/ More importantly, what is the preferred method to find a stable overclock while fiddling with GTL Ref voltages?
When you overclock a CPU it's fairly trouble free, increase FSB, check stability, if stable increase again, if not raise Vcore or Vnb (one at a time) until stable, then resume.
But with GTL Ref voltages I'm in a slightly more troublesome situation...
Should I first start manually setting the VTT and see if I can overclock any higher? Or is manual VTT without manual GTL Ref useless and I need to do both at the same time?
If unstable, should I increase or decrease the GTL Ref voltages to get stable again? Are there any margins one should not go over? (ex: +~100mV?)

Sorry for the noobish questions but this has got to be one of the most confusing aspects of overclocking ^^