I would like to understand more about my northbridge and FSB voltages while overclocking.  Here's my HW and settings:

E6850 G0 running at 3.87GHz (9 x 430)
Gigabyte GA-P35-DS4 rev. 2.0, F9 BIOS
2Gb Curcial Ballistix PC6400 running at DDR2 1032 (5:6 auto)

vCore is at 1.47 BIOS and reads 1.456 cpu-z with loadline calibration enabled.  My memory voltage is set at +.40 which should put it at 2.2v, and it reads at 2.22v in BIOS.

I'm at least 4 hours stable in Prime95, small FFT.

I don't know what my actual FSB and Northbridge voltages are.  Only that I've set them both at +0.1v in BIOS believing that would help stability.  I just don't know how to know if they even need to be increased from normal or if I need more of a bump.  How can you tell?  I added the extra 0.1v because I've read other examples where the same board required an increase in these voltages (0.15v) to remain stable at 430 FSB-which is where I'm at. 

I don't know of any util that reads NB or FSB voltages.

Answered in another post.  Nevermind.