What exactly is the default V-core for Core 2 Duo chips?

[aggressor]

I've seen 1.25v, 1.3v, and 1.35v listed as the default vcore for Core 2 Duos, so which is it? I'm not talking about Speedstep voltage, rather the voltage required to run it at full speed.

 

[Pabster]

Intel lists it as 1.3525V.

Many boards default a bit lower than that with no trouble.