Sorry m8,

like we already told you, there is no Vcore option in bios, unless you plug a QX9775 in - and even then it's buggered.
Asus could easily fix the issue and make Vcore as well as VTT available for any CPU if they pleased, since the mobo supports it and was designed to anyway. It's just that they don't want that, or they don't care, whichever applies.

Only way to increase Vcore is by doing a Vid pin mod to the CPUs. We talked about that here, not confirmed yet, but should be working. I am going to try it on my X5450's, but not before Asus releases a bios that works with E0 CPUs. Until then, I ain't touching them.