1.5v vcore on a homemade watercooling setup, all of the people i see with the high dollar wc rigs make me laff, me and my brother made one for about 60$ comprised of a cheap pump a 79 bonneville heatercore with ac and some pet store tubing. It's not really hard...
Edit: Mines a D0 was hand picked by my brothers friend in the back of a Fry's
Edit #2: The motherboard is a DX58SO Engineering Sample, no such things as serial numbers