i5 2500K #L041C123
PLL: 1.70v
VccIO: 1.075v
DRAM : 1.625v
Vcore BIOS: offset +20
Cooling: Noctua NH-U12P with push/pull

Note: The chip seems stable x49 crunching WCG/Rosetta (4 threads) at offset +00... since the load demand doesn't seem to droop vcore below 1.344v.