I have a Storm R2, I've been debating on lapping my C2D for some better temps. I have never gone over 55C load with over 1.55v at 3.9Ghz with this CPU

My Vcore was at 1.49 while my CPU was at 3Ghz, which it can easily do under stock. I can hit 500Mhz with 1.41v on MCH and I tried up to 1.5ish with no help. My memory is underclocked with 2.0vdimm

One thing I could try pushing a little more is ICHIO and ICH