my asrock b350m pro4 just btoke so i am left withy fx cpu, and i want to know what is stable voltage for amd fx 4300 4.4GHz with deepcool gammax 400, i have vcore set to 1.375v and i want to know the CPU-NB best voltage for 4.4ghz OC
Nobody can "tell" you what that is. It all depends on YOUR particular CPU sample, what motherboard you have, what memory configuration you have, etc. Bottom line though is that overclocking that CPU is ultimately a waste of time. You will not gain enough from doing so to make it even remotely worth your time or effort, and if you don't have a very good motherboard with decent VRMs and heatsinks, you'll probably end up "breaking" that one too.
Covering the basics If you found your way here it's likely you are looking for help with basic overclocking. Either that or you're a long time overclocker interested in seeing whether I had any eye opening insights that you may have been lacking. Rest assured, I don't. This is only intended as...
if it shows you what voltage auto is set it to that voltage then make small voltage decreases and stress test keep on doing it until you find the lowest stable voltage most of the time auto voltage is higher than it needs to be I hope this helps