Looks like I'm pretty sure it's the E6700 L629B079 at fault (poor clocker) as I swapped in my E6600 B1 ES QPGE and
At stock 9x266FSB 1.268v:
Room temp = 23.5C
Bios = -44.5C
Evap temp idle = -44.5C
Systool Dual 32M Pi tests
@9x456FSB = 4104Mhz at 1.5v bios (1.48v)
@9x467FSB = 4202Mhz at 1.55v bios (1.536v)
@9x478FSB = 4302Mhz at 1.60v bios (1.584v)
@9x480FSB = 4320Mhz at 1.65v bios (1.640v) - PC Probe2 = -13C load in windows / Evap load temp = -34.9C
@9x485FSB = 4367Mhz at 1.65v bios (1.640v)
@9x489FSB = 4401Mhz at 1.675v bios (1.664v) - PC Probe2 = -9C load in windows / Evap load temp = -33.4C
Pencil vdroop mod still in place