Guys,
I've gotten my system stable with:

446 x 9 = 4015 Mhhz
Vcore = 1.2875
Vnb = 1.30

System is very cool and stable. I tried going to 466 fsb (~ 4.1ghz), and did not run stable, so I assume I need more Vnb and Vcore. I dont think the extra speed is worth the power/temp increase, so now I want to reign the cores and temps down as low as possible.

I noticed several E0's running 1.1-1.2 Vcore...I'm gonna see how mine does there. My question is, how low can I safely go with the Vnb? can I get away with 1.2v?