Chri$ch

Could not find any DS with pin outs you posted. Can you show, if it's public info?
There is no PEG RBIAS pin on SB package, which help on Clarks/Lynns 1156.

But there are other compensation pins, like PEG_ICOMPI, PEG_ICOMPO, PEG_RCOMPO.
Anyway, I'm almost sure that cold issues have different origin than was on 1156 CPU's. Maybe it's SA or ringbus wastes cold play, etc.