How does vCore work and what is NB?

[Oxicoi]

So I have an A10 6800k and the CPU VID (which I'm assuming is vCore) is at 1.2750. Well, in my motherboard, I can increase the vCore of the CPU (not NB). The highest I can go is +0.300. Now, does that work additionally? So if I were to add 1.2750 + 0.300, it would equal 1.5750? Or would it act as the second number after the period? I don't get it and CPU-Z doesn't have a set voltage for me. It changes almost every second.

Now I've never seen NB before. I've read up and it's a mix between CPU, RAM, and GPU. If so, how much should I be overclocking it and how does mhz play in it?


Motherboard: Gigabyte GA-F2A68HM-H
PSU: 750W Thermaltake 80+ Bronze
CPU: A10 6800k (Richland)
GPU: GTX 970
RAM: 16GB
STORAGE: 2TB HDD

 

[lumineZ]

NB = North Bridge ---> https://en.wikipedia.org/wiki/Northbridge_(computing)

Be very carefull when messing with Vcore... Setting that to high can in worst case destroy your CPU.
Read up about overclocking with your motherboard and CPU...

But I can atleast say one thing and that is that trying 1.5000 +++ volts is a BIG no no.