squishee,
I don't know of a way to read Northbridge temps on a desktop with this board. If you know one(other than adding some sort of temp probe), please tell.

I just ran LinX for a few minutes with CPU temps in low 60s and Vreg reading 48 on desktop. I have my fans on low so my temps may be a little higher now. I shut down and immediately went to BIOS. Vreg temp was at 45 and NB was 48. I know this in not accurate for load but its the best I know how.