Quote Originally Posted by slim142 View Post
Another GTL to mess with? I didnt know there was such thing as NB GTL. Well, since we have 2 people so far who are stable and didnt mess with it, I wouldnt touch it at all.
Yes it certainly exists.

NB GTL_REF Ratio - [Auto, Default, -126mV ~ +160mV] The NB (SPP) GTL reference voltage provides the same functionality as those for the CPU, the only difference being that the Northbridge uses only a single value. Tuning in the right GTL reference voltage (usually near the nominal 67% value) can sometimes lead to lower stable VDIMM requirements.
From Anantech